we may encounter difficulty in integrating features on games developed for mobile platforms that a sufficient number of players will pay for; and

we will need to move beyond payment methods provided by social networks and successfully allow for a variety of payment methods and systems based on the mobile platform, geographies and other factors.

These and other uncertainties make it difficult to know whether we will succeed in developing commercially viable games for mobile. If we do not succeed in doing so, our growth prospects will suffer.

Our core values of focusing on our players first and acting for the long term may conflict with the short-term interests of our business.

One of our core values is to focus on surprising and delighting our players, which we believe is essential to our success and serves the best, long-term interests of Zynga and our stakeholders. Therefore, we have made, in the past and may make in the future, significant investments or changes in strategy that we think will benefit our players, even if our decision negatively impacts our operating results in the short term. For example, in late 2009 and in 2010 we reduced in-game advertising offers in order to improve player experience. This decrease in in-game offers led to a reduction of advertising revenue in 2010 as compared to 2009. Our decisions may not result in the long-term benefits that we expect, in which case the success of our games, business and operating results could be harmed.

If we lose the services of our founder and Chief Executive Officer or other members of our senior management team, we may not be able to execute our business strategy.

Our success depends in a large part upon the continued service of our senior management team. In particular, our founder and Chief Executive Officer, Mark Pincus, is critical to our vision, strategic direction, culture, products and technology. We do not maintain key-man insurance for Mr. Pincus or any other member of our senior management team. The loss of our founder and Chief Executive Officer, even temporarily, or any other member of senior management would harm our business.

If we are unable to attract and retain highly qualified employees, we may not be able to grow effectively.

Our ability to compete and grow depends in large part on the efforts and talents of our employees. Such employees, particularly game designers, product managers and engineers, are in high demand, and we devote significant resources to identifying, hiring, training, successfully integrating and retaining these employees. We have historically hired a number of key personnel through acquisitions, and as competition with several other game companies increases, we may incur significant expenses in continuing this practice. The loss of employees or the inability to hire additional skilled employees as necessary could result in significant disruptions to our business, and the integration of replacement personnel could be time-consuming and expensive and cause additional disruptions to our business.

We believe that two critical components of our success and our ability to retain our best people are our culture and our competitive compensation practices. As we continue to grow rapidly, and we develop the infrastructure of a public company, we may find it difficult to maintain our entrepreneurial, execution-focused culture. In addition, many of our employees may be able to receive significant proceeds from sales of our equity in the public markets after our initial public offering, which may reduce their motivation to continue to work for us. Moreover, we expect that this offering will create disparities in wealth among our employees, which may harm our culture and relations among employees.

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An increasing number of individuals are utilizing devices other than personal computers to access the Internet, and versions of our games developed for these devices might not gain widespread adoption, or may not function as intended.

The number of individuals who access the Internet through devices other than a personal computer, such as smartphones, tablets, televisions and set-top box devices, has increased dramatically, and we believe this trend is likely to continue. The generally lower processing speed, power, functionality and memory associated with these devices make playing our games through such devices more difficult; and the versions of our games developed for these devices may not be compelling to players. In addition, each device manufacturer or platform provider may establish unique or restrictive terms and conditions for developers on such devices or platforms, and our games may not work well or be viewable on these devices as a result. We have limited experience in developing and optimizing versions of our games for players on alternative devices and platforms. To expand our business, we will need to support a number of alternative devices and technologies. Once developed, we may choose to port or convert a game into separate versions for alternative devices with different technological requirements. As new devices and new mobile platforms or updates to platforms are continually being released, we may encounter problems in developing versions of our games for use on these alternative devices and we may need to devote significant resources to the creation, support, and maintenance of such devices and platforms. If we are unable to successfully expand the platforms and devices on which our games are available, or if the versions of our games that we create for alternative platforms and devices are not compelling to our players, our business will suffer.

Expansion into international markets is important for our growth, and as we expand internationally, we face additional business, political, regulatory, operational, financial and economic risks, any of which could increase our costs and hinder such growth.

Continuing to expand our business to attract players in countries other than the United States is a critical element of our business strategy. An important part of targeting international markets is developing offerings that are localized and customized for the players in those markets. We have limited operating history as a company outside the United States. We expect to continue to devote significant resources to international expansion through acquisitions, the establishment of additional offices and development studios, and increasing our foreign language offerings. Our ability to expand our business and to attract talented employees and players in an increasing number of international markets requires considerable management attention and resources and is subject to the particular challenges of supporting a rapidly growing business in an environment of multiple languages, cultures, customs, legal systems, alternative dispute systems, regulatory systems and commercial infrastructures. We have experienced difficulties in the past and have not been successful in all the countries we have entered. Expanding our international focus may subject us to risks that we have not faced before or increase risks that we currently face, including risks associated with:

recruiting and retaining talented and capable management and employees in foreign countries;

challenges caused by distance, language and cultural differences;

developing and customizing games and other offerings that appeal to the tastes and preferences of players in international markets;

 

competition from local game makers with significant market share in those markets and with a better understanding of player preferences;

protecting and enforcing our intellectual property rights;

negotiating agreements with local distribution platforms that are sufficiently economically beneficial to us and protective of our rights;

the inability to extend proprietary rights in our brand, content or technology into new jurisdictions;

implementing alternative payment methods for virtual goods in a manner that complies with local laws and practices and protects us from fraud;

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compliance with applicable foreign laws and regulations, including privacy laws and laws relating to content;

 

compliance with anti-bribery laws including without limitation, compliance with the Foreign Corrupt Practices Act;

credit risk and higher levels of payment fraud;

currency exchange rate fluctuations;

 

protectionist laws and business practices that favor local businesses in some countries;

 

foreign tax consequences;

 

foreign exchange controls or U.S. tax restrictions that might restrict or prevent us from repatriating income earned in countries outside the United States;

 

political, economic and social instability;

higher costs associated with doing business internationally;

export or import regulations; and

trade and tariff restrictions.

Entering new international markets will be expensive, our ability to successfully gain market acceptance in any particular market is uncertain, and the distraction of our senior management team could harm our business.

Competition within the broader entertainment industry is intense and our existing and potential players may be attracted to competing forms of entertainment such as offline and traditional online games, television, movies and sports, as well as other entertainment options on the Internet.

Our players face a vast array of entertainment choices. Other forms of entertainment, such as offline, traditional online, personal computer and console games, television, movies, sports and the Internet, are much larger and more well-established markets and may be perceived by our players to offer greater variety, affordability, interactivity and enjoyment. These other forms of entertainment compete for the discretionary time and income of our players. If we are unable to sustain sufficient interest in our games in comparison to other forms of entertainment, including new forms of entertainment, our business model may no longer be viable.

There are low barriers to entry in the social game industry, and competition is intense.

The social game industry is highly competitive, with low barriers to entry and we expect more companies to enter the sector and a wider range of social games to be introduced. Our competitors that develop social games for social networks vary in size and include publicly-traded companies such as Electronic Arts Inc. and The Walt Disney Company and privately-held companies such as Crowdstar, Inc., Vostu, Ltd. and wooga GmbH. In addition, online game developers and distributors who are primarily focused on specific international markets, such as Tencent Holdings Limited in Asia, and high-profile companies with significant online presences that to date have not developed social games, such as Amazon.com, Facebook, Google Inc., Microsoft Corporation and Yahoo! Inc., may decide to develop social games. Some of these current and potential competitors have significant resources for developing or acquiring additional games, may be able to incorporate their own strong brands and assets into their games, have a more diversified set of revenue sources than we do and may be less

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severely affected by changes in consumer preferences, regulations or other developments that may impact the online social game industry. In addition, we have limited experience in developing games for mobile and other platforms and our ability to succeed on those platforms is uncertain. As we continue to devote significant resources to developing games for those platforms, we will face significant competition from established companies that may have far greater experience than us, including Electronic Arts Inc., DeNA Co. Ltd., Gameloft SA, Glu Mobile Inc. and Rovio Mobile Ltd. We expect new mobile-game competitors to enter the market and existing competitors to allocate more resources to develop and market competing games and applications.

The value of our virtual goods is highly dependent on how we manage the economies in our games. If we fail to manage our game economies properly, our business may suffer.

Paying players purchase virtual goods in our games because of the perceived value of these goods which is dependent on the relative ease of securing an equivalent good via non-paid means within the game. The perceived value of these virtual goods can be impacted by an increase in the availability of free or discounted Facebook Credits or by various actions that we take in the games including offering discounts for virtual goods, giving away virtual goods in promotions or providing easier non-paid means to secure these goods. If we fail to manage our virtual economies properly, players may be less likely to purchase virtual goods and our business may suffer.

Some of our players may make sales and/or purchases of virtual goods used in our games through unauthorized third-party websites, which may impede our revenue growth.

Some of our players may make sales and/or purchases of our virtual goods, such as Zynga Poker virtual poker chips, through unauthorized third-party sellers in exchange for real currency. These unauthorized transactions are usually arranged on third-party websites. We do not generate any revenue from these transactions. Accordingly, these unauthorized purchases and sales from third-party sellers could impede our revenue and profit growth by, among other things:

decreasing revenue from authorized transactions;

 

downward pressure on the prices we charge players for our virtual currency and virtual goods;

lost revenue from paying players who stop playing a particular game;

costs we incur to develop technological measures to curtail unauthorized transactions;

legal claims relating to the diminution of value of our virtual goods; and

increased customer support costs to respond to dissatisfied players.

To discourage unauthorized purchases and sales of our virtual goods, we have stated in our terms of service that the buying or selling of virtual currency and virtual goods from unauthorized third-party sellers may result in bans from our games and/or legal action. We have banned players as a result of such activities. We have also developed technological measures to help detect unauthorized transactions. If we decide to implement further restrictions on players’ ability to transfer virtual goods, we may lose players, which could harm our financial condition and results of operations.

The proliferation of “cheating” programs and scam offers that seek to exploit our games and players affects the game-playing experience and may lead players to stop playing our games.

Unrelated third parties have developed, and may continue to develop, “cheating” programs that enable players to exploit our games, play them in an automated way or obtain unfair advantages over other players who do play fairly. These programs harm the experience of players who play fairly and may disrupt the virtual economy of our games. In addition, unrelated third parties attempt to scam our players with fake offers for virtual

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goods. We devote significant resources to discover and disable these programs and activities, and if we are unable to do so quickly our operations may be disrupted, our reputation damaged and players may stop playing our games. This may lead to lost revenue from paying players, increased cost of developing technological measures to combat these programs and activities, legal claims relating to the diminution in value of our virtual currency and goods, and increased customer service costs needed to respond to dissatisfied players.

Our quarterly operating results are volatile and difficult to predict, and our stock price may decline if we fail to meet the expectations of securities analysts or investors.

Our bookings, revenue, traffic and operating results could vary significantly from quarter-to-quarter and year-to-year and may fail to match our past performance or the expectations of securities analysis or investors because of a variety of factors, some of which are outside of our control. Any of these events could cause the market price of our Class A common stock to fluctuate. Factors that may contribute to the variability of our operating results include the risk factors listed in this section and the factors discussed in the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Factors Affecting Our Performance.”

In particular, we recognize revenue from sale of our virtual goods in accordance with GAAP, which is complex and based on our assumptions and historical data with respect to the sale and use of various types of virtual goods. In the event that such assumptions are revised based on new data or there are changes in the historical mix of virtual goods sold due to new game introductions, reduced virtual good sales in existing games or other factors or there are changes in our estimates of average playing periods, the amount of revenue that we recognize in any particular period may fluctuate significantly. For further information regarding our revenue recognition policy, see the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies—Revenue Recognition.”

Given our short operating history and the rapidly evolving social game industry, our historical operating results may not be useful in predicting our future operating results. In addition, metrics we have developed or those available from third parties regarding our industry and the performance of our games, including DAUs, MAUs, MUUs and ABPU may not be indicative of our financial performance.

Failure to protect or enforce our intellectual property rights or the costs involved in such enforcement could harm our business and operating results.

We regard the protection of our trade secrets, copyrights, trademarks, trade dress, domain names and other product rights as critical to our success. We strive to protect our intellectual property rights by relying on federal, state and common law rights, as well as contractual restrictions. We enter into confidentiality and invention assignment agreements with our employees and contractors and confidentiality agreements with parties with whom we conduct business in order to limit access to, and disclosure and use of, our proprietary information. However, these contractual arrangements and the other steps we have taken to protect our intellectual property may not prevent the misappropriation of our proprietary information or deter independent development of similar technologies by others.

We pursue the registration of our domain names, trademarks, and service marks in the United States and in certain locations outside the United States. We are seeking to protect our trademarks, patents and domain names in an increasing number of jurisdictions, a process that is expensive and time-consuming and may not be successful or which we may not pursue in every location. We may, over time, increase our investment in protecting our innovations through increased patent filings that are expensive and time-consuming and may not result in issued patents that can be effectively enforced. The Leahy-Smith America Invents Act, or the Leahy-Smith Act, was adopted in September 2011. The Leahy-Smith Act includes a number of significant changes to

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United States patent law, including provisions that affect the way patent applications will be prosecuted and may also affect patent litigation. The United States Patent and Trademark Office is currently developing regulations and procedures to govern administration of the Leahy-Smith Act, and many of the substantive changes to patent law associated with the Leahy-Smith Act will not become effective until up to 18 months after its enactment. Accordingly, it is not clear what, if any, impact the Leahy-Smith Act will have on the operation of our business. However, the Leahy-Smith Act and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could harm our business.

Litigation may be necessary to enforce our intellectual property rights, protect our trade secrets or determine the validity and scope of proprietary rights claimed by others. Any litigation of this nature, regardless of outcome or merit, could result in substantial costs, adverse publicity or diversion of management and technical resources, any of which could adversely affect our business and operating results. If we fail to maintain, protect and enhance our intellectual property rights, our business and operating results may be harmed.

We are, and may in the future be, subject to intellectual property disputes, which are costly to defend and could require us to pay significant damages and could limit our ability to use certain technologies in the future.

From time to time, we have faced, and we expect to face in the future, allegations that we have infringed the trademarks, copyrights, patents and other intellectual property rights of third parties, including from our competitors, non-practicing entities and former employers of our personnel. Patent and other intellectual property litigation may be protracted and expensive, and the results are difficult to predict. As the result of any court judgment or settlement we may be obligated to cancel the launch of a new game, stop offering certain features, pay royalties or significant settlement costs, purchase licenses or modify our games and features while we develop substitutes.

In addition, we use open source software in our games and expect to continue to use open source software in the future. From time to time, we may face claims from companies that incorporate open source software into their products, claiming ownership of, or demanding release of, the source code, the open source software and/or derivative works that were developed using such software, or otherwise seeking to enforce the terms of the applicable open source license. These claims could also result in litigation, require us to purchase a costly license or require us to devote additional research and development resources to change our games, any of which would have a negative effect on our business and operating results.

Although we do not believe that the final outcome of litigation and claims that we currently face will have a material adverse effect on our business, our expectations may not prove to be correct. Even if these matters do not result in litigation or are resolved in our favor or without significant cash settlements, these matters, and the time and resources necessary to litigate or resolve them, could harm our business, operating results, financial condition, reputation or the market price of our Class A common stock.

Programming errors or flaws in our games could harm our reputation or decrease market acceptance of our games, which would harm our operating results.

Our games may contain errors, bugs, flaws or corrupted data, and these defects may only become apparent after their launch, particularly as we launch new games and rapidly release new features to existing games under tight time constraints. We believe that if our players have a negative experience with our games, they may be less inclined to continue or resume playing our games or recommend our games to other potential players. Undetected programming errors, game defects and data corruption can disrupt our operations, adversely affect the game experience of our players by allowing players to gain unfair advantage, harm our reputation, cause our players to stop playing our games, divert our resources and delay market acceptance of our games, any of which could result in legal liability to us or harm our operating results.

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Evolving regulations concerning data privacy may result in increased regulation and different industry standards, which could prevent us from providing our current games to our players, or require us to modify our games, thereby harming our business.

The regulatory framework for privacy issues worldwide is currently in flux and is likely to remain so for the foreseeable future. Practices regarding the collection, use, storage, transmission and security of personal information by companies operating over the Internet and mobile platforms have recently come under increased public scrutiny, and civil claims alleging liability for the breach of data privacy have been asserted against us. The U.S. government, including the Federal Trade Commission and the Department of Commerce, has announced that it is reviewing the need for greater regulation for the collection of information concerning consumer behavior on the Internet, including regulation aimed at restricting certain targeted advertising practices. In addition, the European Union is in the process of proposing reforms to its existing data protection legal framework, which may result in a greater compliance burden for companies with users in Europe. Various government and consumer agencies have also called for new regulation and changes in industry practices.

We began operations in 2007 and have grown rapidly. While our administrative systems have developed rapidly, during our earlier history our practices relating to intellectual property, data privacy and security, and legal compliance may not have been as robust as they are now, and there may be unasserted claims arising from this period that we are not able to anticipate. In addition, our business, including our ability to operate and expand internationally, could be adversely affected if laws or regulations are adopted, interpreted, or implemented in a manner that is inconsistent with our current business practices and that require changes to these practices, the design of our website, games, features or our privacy policy. In particular, the success of our business has been, and we expect will continue to be, driven by our ability to responsibly use the data that our players share with us. Therefore, our business could be harmed by any significant change to applicable laws, regulations or industry practices regarding the use or disclosure of data our players choose to share with us, or regarding the manner in which the express or implied consent of consumers for such use and disclosure is obtained. Such changes may require us to modify our games and features, possibly in a material manner, and may limit our ability to develop new games and features that make use of the data that our players voluntarily share with us.

We process, store and use personal information and other data, which subjects us to governmental regulation and other legal obligations related to privacy, and our actual or perceived failure to comply with such obligations could harm our business.

We receive, store and process personal information and other player data, and we enable our players to share their personal information with each other and with third parties, including on the Internet and mobile platforms. There are numerous federal, state and local laws around the world regarding privacy and the storing, sharing, use, processing, disclosure and protection of personal information and other player data on the Internet and mobile platforms, the scope of which are changing, subject to differing interpretations, and may be inconsistent between countries or conflict with other rules. We generally comply with industry standards and are subject to the terms of our own privacy policies and privacy-related obligations to third parties (including voluntary third-party certification bodies such as TRUSTe). We strive to comply with all applicable laws, policies, legal obligations and certain industry codes of conduct relating to privacy and data protection, to the extent reasonably attainable. However, it is possible that these obligations may be interpreted and applied in a manner that is inconsistent from one jurisdiction to another and may conflict with other rules or our practices. Any failure or perceived failure by us to comply with our privacy policies, our privacy-related obligations to players or other third parties, or our privacy-related legal obligations, or any compromise of security that results in the unauthorized release or transfer of personally identifiable information or other player data, may result in governmental enforcement actions, litigation or public statements against us by consumer advocacy groups or others and could cause our players to lose trust in us, which could have an adverse effect on our business. Additionally, if third parties we work with, such as players, vendors or developers, violate applicable laws or our policies, such violations may also put our players’ information at risk and could in turn have an adverse effect on our business.

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In the area of information security and data protection, many states have passed laws requiring notification to players when there is a security breach for personal data, such as the 2002 amendment to California’s Information Practices Act, or requiring the adoption of minimum information security standards that are often vaguely defined and difficult to practically implement. The costs of compliance with these laws may increase in the future as a result of changes in interpretation. Furthermore, any failure on our part to comply with these laws may subject us to significant liabilities.

Our business is subject to a variety of other U.S. and foreign laws, many of which are unsettled and still developing and which could subject us to claims or otherwise harm our business.

We are subject to a variety of laws in the United States and abroad, including laws regarding consumer protection, intellectual property, export and national security, that are continuously evolving and developing. The scope and interpretation of the laws that are or may be applicable to us are often uncertain and may be conflicting, particularly laws outside the United States. For example, laws relating to the liability of providers of online services for activities of their users and other third parties are currently being tested by a number of claims, including actions based on invasion of privacy and other torts, unfair competition, copyright and trademark infringement, and other theories based on the nature and content of the materials searched, the ads posted or the content provided by users. It is also likely that as our business grows and evolves and our games are played in a greater number of countries, we will become subject to laws and regulations in additional jurisdictions. We are potentially subject to a number of foreign and domestic laws and regulations that affect the offering of certain types of content, such as that which depicts violence, many of which are ambiguous, still evolving and could be interpreted in ways that could harm our business or expose us to liability. In addition, certain of our games, including Zynga Poker , may become subject to gambling-related rules and regulations and expose us to civil and criminal penalties if we do not comply. It is difficult to predict how existing laws will be applied to our business and the new laws to which we may become subject. See the discussion included in the section titled “Business — Government Regulation.”

If we are not able to comply with these laws or regulations or if we become liable under these laws or regulations, we could be directly harmed, and we may be forced to implement new measures to reduce our exposure to this liability. This may require us to expend substantial resources or to modify our games, which would harm our business, financial condition and results of operations. In addition, the increased attention focused upon liability issues as a result of lawsuits and legislative proposals could harm our reputation or otherwise impact the growth of our business. Any costs incurred as a result of this potential liability could harm our business and operating results.

It is possible that a number of laws and regulations may be adopted or construed to apply to us in the United States and elsewhere that could restrict the online and mobile industries, including player privacy, advertising, taxation, content suitability, copyright, distribution and antitrust. Furthermore, the growth and development of electronic commerce and virtual goods may prompt calls for more stringent consumer protection laws that may impose additional burdens on companies such as ours conducting business through the Internet and mobile devices. We anticipate that scrutiny and regulation of our industry will increase and we will be required to devote legal and other resources to addressing such regulation. For example, existing laws or new laws regarding the regulation of currency and banking institutions may be interpreted to cover virtual currency or goods. If that were to occur we may be required to seek licenses, authorizations or approvals from relevant regulators, the granting of which may be dependent on us meeting certain capital and other requirements and we may be subject to additional regulation and oversight, all of which could significantly increase our operating costs. Changes in current laws or regulations or the imposition of new laws and regulations in the United States or elsewhere regarding these activities may lessen the growth of social game services and impair our business.

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Companies and governmental agencies may restrict access to Facebook, our website or the Internet generally, which could lead to the loss or slower growth of our player base.

Our players need to access the Internet and in particular Facebook and our website to play our games. Companies and governmental agencies, could block access to Facebook, our website or the Internet generally for a number of reasons such as security or confidentiality concerns or regulatory reasons, or they may adopt policies that prohibit employees from accessing Facebook, our website or other social platforms. For example, the government of the People’s Republic of China has blocked access to Facebook in China. If companies or governmental entities block or limit access to Facebook or our website or otherwise adopt policies restricting players from playing our games our business could be negatively impacted and could lead to the loss or slower growth of our player base.

Our business will suffer if we are unable to successfully integrate acquired companies into our business or otherwise manage the growth associated with multiple acquisitions.

We have acquired businesses, personnel and technologies in the past and we intend to continue to pursue acquisitions that are complementary to our existing business and expand our employee base and the breadth of our offerings. Our ability to grow through future acquisitions will depend on the availability of suitable acquisition and investment candidates at an acceptable cost, our ability to compete effectively to attract these candidates and the availability of financing to complete larger acquisitions. Since we expect the social game industry to consolidate in the future, we may face significant competition in executing our growth strategy. Future acquisitions or investments could result in potential dilutive issuances of equity securities, use of significant cash balances or incurrence of debt, contingent liabilities or amortization expenses related to goodwill and other intangible assets, any of which could adversely affect our financial condition and results of operations. The benefits of an acquisition or investment may also take considerable time to develop, and we cannot be certain that any particular acquisition or investment will produce the intended benefits.

Integration of a new company’s operations, assets and personnel into ours will require significant attention from our management. The diversion of our management’s attention away from our business and any difficulties encountered in the integration process could harm our ability to manage our business. Future acquisitions will also expose us to potential risks, including risks associated with any acquired liabilities, the integration of new operations, technologies and personnel, unforeseen or hidden liabilities and unanticipated, information security vulnerabilities, the diversion of resources from our existing businesses, sites and technologies, the inability to generate sufficient revenue to offset the costs and expenses of acquisitions, and potential loss of, or harm to, our relationships with employees, players, and other suppliers as a result of integration of new businesses.

Fluctuations in foreign currency exchange rates will affect our financial results, which we report in U.S. dollars.

As we continue to expand our international operations, we become more exposed to the effects of fluctuations in currency exchange rates. We incur expenses for employee compensation and other operating expenses at our non-U.S. locations in the local currency, and an increasing percentage of our international revenue is from players who pay us in currencies other than the U.S. dollar. Fluctuations in the exchange rates between the U.S. dollar and those other currencies could result in the dollar equivalent of such expenses being higher and/or the dollar equivalent of such foreign-denominated revenue being lower than would be the case if exchange rates were stable. This could have a negative impact on our reported operating results. To date, we have not engaged in any hedging strategies, and any such strategies, such as forward contracts, options and foreign exchange swaps related to transaction exposures that we may implement to mitigate this risk may not eliminate our exposure to foreign exchange fluctuations.

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The enactment of legislation implementing changes in the U.S. taxation of international business activities or the adoption of other tax reform policies could materially impact our financial position and results of operations.

The current administration has made public statements indicating that it has made international tax reform a priority, and key members of the U.S. Congress have conducted hearings and proposed new legislation. Recent changes to U.S. tax laws, including limitations on the ability of taxpayers to claim and utilize foreign tax credits and the deferral of certain tax deductions until earnings outside of the United States are repatriated to the United States, as well as changes to U.S. tax laws that may be enacted in the future, could impact the tax treatment of our foreign earnings. Due to the large and expanding scale of our international business activities, any changes in the U.S. taxation of such activities may increase our worldwide effective tax rate and harm our financial position and results of operations.

A change in the application of the tax laws of various jurisdictions could result in an increase to our worldwide effective tax rate and a change in how we operate our business.

Our corporate structure and intercompany arrangements, including the manner in which we develop and use our intellectual property and the transfer pricing of our intercompany transactions, are intended to provide us worldwide tax efficiencies. The application of the tax laws of various jurisdictions, including the United States, to our international business activities is subject to interpretation and depends on our ability to operate our business in a manner consistent with our corporate structure and intercompany arrangements. The taxing authorities of the jurisdictions in which we operate may challenge our methodologies for valuing developed technology or intercompany arrangements, including our transfer pricing, or determine that the manner in which we operate our business is not consistent with the manner in which we report our income to the jurisdictions, which could increase our worldwide effective tax rate and harm our financial position and results of operations.

Our facilities are located near known earthquake fault zones, and the occurrence of an earthquake or other natural disaster could cause damage to our facilities and equipment, which could require us to curtail or cease operations.

Our principal offices and a network operations center are located in the San Francisco Bay Area, an area known for earthquakes, and are thus vulnerable to damage. We are also vulnerable to damage from other types of disasters, including power loss, fire, explosions, floods, communications failures, terrorist attacks and similar events. If any disaster were to occur, our ability to operate our business at our facilities could be impaired.

We may require additional capital to meet our financial obligations and support business growth, and this capital might not be available on acceptable terms or at all.

We intend to continue to make significant investments to support our business growth and may require additional funds to respond to business challenges, including the need to develop new games and features or enhance our existing games, improve our operating infrastructure or acquire complementary businesses, personnel and technologies. Accordingly, we may need to engage in equity or debt financings to secure additional funds. If we raise additional funds through future issuances of equity or convertible debt securities, our existing stockholders could suffer significant dilution, and any new equity securities we issue could have rights, preferences and privileges superior to those of holders of our Class A common stock. Any debt financing we secure in the future could involve restrictive covenants relating to our capital raising activities and other financial and operational matters, which may make it more difficult for us to obtain additional capital and to pursue business opportunities, including potential acquisitions. We may not be able to obtain additional financing on terms favorable to us, if at all. If we are unable to obtain adequate financing or financing on terms satisfactory to us when we require it, our ability to continue to support our business growth and to respond to business challenges could be significantly impaired, and our business may be harmed.

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Risks Related to This Offering and Ownership of Our Class A Common Stock

The three class structure of our common stock has the effect of concentrating voting control with those stockholders who held our stock prior to this offering, including our founder and Chief Executive Officer and our other executive officers, employees and directors and their affiliates; this will limit your ability to influence corporate matters.

Our Class C common stock has 70 votes per share, our Class B common stock has seven votes per share and our Class A common stock, which is the stock we are offering in this offering, has one vote per share. The holders of Class B common stock and Class C common stock, including our founder and Chief Executive Officer, Mark Pincus, and our other executive officers, employees and directors and their affiliates, will collectively hold approximately     % of the voting power of our outstanding capital stock following this offering. As a result, these holders, along with Mr. Pincus, will have significant influence over the management and affairs of the company and over matters requiring stockholder approval, including the election of directors and significant corporate transactions, such as a merger or other sale of our company or its assets, for the foreseeable future. This concentrated voting control will limit your ability to influence corporate matters and could adversely affect the market price of our Class A common stock. Future sales by holders of Class B common stock or Class C common stock will result in those shares converting to Class A common stock, which will have the effect, over time, of increasing the relative voting power of those stockholders who retain their existing shares of Class B or Class C common stock. In addition, as shares of Class B common stock are sold and converted to Class A common stock, the sole holder of Class C common stock, Mr. Pincus, will have greater relative voting control to the extent he retains his existing shares of Class C common stock. Mr. Pincus is entitled to vote his shares in his own interests and may do so.

Certain provisions in our charter documents and under Delaware law could limit attempts by our stockholders to replace or remove our board of directors or current management and limit the market price of our Class A common stock.

Provisions in our certificate of incorporation and bylaws may have the effect of delaying or preventing changes in our board of directors or management. Our certificate of incorporation and bylaws will include provisions that:

establish an advance notice procedure for stockholder proposals to be brought before an annual meeting, including proposed nominations of persons for election to our board of directors;

prohibit cumulative voting in the election of directors; and

reflect three classes of common stock, as discussed above.

These provisions may frustrate or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for stockholders to replace members of our board of directors, which is responsible for appointing the members of our management. In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which generally prohibits a Delaware corporation from engaging in any of a broad range of business combinations with any “interested” stockholder for a period of three years following the date on which the stockholder became an “interested” stockholder.

Our share price may be volatile, and you may be unable to sell your shares at or above the initial public offering price, if at all.

The initial public offering price for the shares of our Class A common stock will be determined by negotiations between us and representatives of the underwriters and may not be indicative of prices that will prevail in the trading market. The market price of our Class A common stock could be subject to wide fluctuations in response to many risk factors listed in this section, and others beyond our control, including:

changes in projected operational and financial results;

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issuance of new or updated research or reports by securities analysts;

the use by investors or analysts of third-party data regarding our business that may not reflect our actual performance;

fluctuations in the valuation of companies perceived by investors to be comparable to us;

fluctuations in the trading volume of our shares, or the size of our public float; and

general economic and market conditions.

Furthermore, the stock markets have experienced extreme price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, political and market conditions such as recessions, interest rate changes or international currency fluctuations, may negatively impact the market price of our Class A common stock. If the market price of our Class A common stock after this offering does not exceed the initial public offering price, you may not realize any return on your investment and may lose some or all of your investment. In the past, companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. We may be the target of this type of litigation in the future. Securities litigation against us could result in substantial costs and divert our management’s attention from other business concerns, which could harm our business.

Our Class A common stock price may be volatile due to third-party data regarding our games.

Third parties, such as AppData, publish daily data about us and other social game companies with respect to DAUs and MAUs and other information concerning social game usage, in particular on Facebook. These metrics can be volatile, particularly for specific games, and in many cases do not accurately reflect the actual levels of usage of our games across all platforms and may not correlate to our bookings or revenue from the sale of virtual goods. There is a possibility that third parties could change their methodologies for calculating these metrics in the future. To the extent that securities analysts or investors base their views of our business or prospects on such third-party data, the price of our Class A common stock may be volatile and may not reflect the performance of our business.

We may invest or spend the proceeds of this offering in ways with which you may not agree or in ways which may not yield a return.

The net proceeds from the sale of shares by us in the offering may be used for general corporate purposes, including working capital. We may also use a portion of the net proceeds to acquire or invest in complementary businesses, technologies or other assets. Our management will have considerable discretion in the application of the net proceeds, and you will not have the opportunity, as part of your investment decision, to assess whether the proceeds are being used appropriately. The net proceeds to us from this offering may be invested with a view towards long-term benefits for our stockholders, and this may not increase our operating results or the market value of our Class A common stock. Until the net proceeds are used, they may be placed in investments that do not produce significant income or that may lose value.

If securities or industry analysts do not publish research about our business, or publish negative reports about our business, our share price and trading volume could decline.

The trading market for our Class A common stock will, to some extent, depend on the research and reports that securities or industry analysts publish about our business. We do not have any control over these analysts. If one or more of the analysts who cover us downgrade our shares or change their opinion of our shares, our share price would likely decline. If one or more of these analysts cease coverage of our company or fail to regularly publish reports on us, we could lose visibility in the financial markets, which could cause our share price or trading volume to decline.

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Future sales of our Class A common stock in the public market could cause our share price to decline.

Sales of a substantial number of shares of our Class A common stock in the public market after this offering, or the perception that these sales might occur, could depress the market price of our Class A common stock and could impair our ability to raise capital through the sale of additional equity securities. Based on the total number of outstanding shares of our common stock as of September 30, 2011, upon the closing of this offering, we will have              shares of Class A common stock,              shares of Class B common stock and 20,517,472 shares of Class C common stock outstanding, assuming no exercise of our outstanding options and warrants or vesting of ZSUs, and the sale of              shares of our Class A common stock to be sold by the selling stockholders.

All of the shares of Class A common stock sold in this offering will be freely tradable without restrictions or further registration under the Securities Act of 1933, as amended, or the Securities Act, except for any shares held by our affiliates as defined in Rule 144 under the Securities Act. The              shares of Class B common stock and 20,517,472 shares of Class C common stock outstanding after this offering, based on shares outstanding as of September 30, 2011, will be restricted as a result of securities laws, lock-up agreements or other contractual restrictions that restrict transfers after the date of this prospectus. Please see the discussion in the section titled “Shares Eligible For Future Sale”.

After this offering, the holders of              shares of Class B common stock, or     % of our total outstanding common stock, and 20,517,472 shares of Class C common stock, or     % of our total outstanding common stock, based on shares outstanding as of September 30, 2011 and giving effect to the sale of shares by the selling stockholders, will be entitled to rights with respect to registration of these shares under the Securities Act pursuant to an investors’ rights agreement. Shares of our Class B and Class C common stock automatically will convert into shares of our Class A common stock upon any sale or transfer, whether or not for value, except for certain transfers described in our amended and restated certificate of incorporation to become effective upon closing of this offering. If these holders of our Class B and Class C common stock, by exercising their registration rights, sell a large number of shares, they could adversely affect the market price for our Class A common stock. If we file a registration statement for the purposes of selling additional shares to raise capital and are required to include shares held by these holders pursuant to the exercise of their registration rights, our ability to raise capital may be impaired. We intend to file a registration statement on Form S-8 under the Securities Act to register up to approximately              million shares of our common stock for issuance under our Amended and Restated 2007 Equity Incentive Plan, 2011 Employee Stock Purchase Plan and 2011 Equity Incentive Plan. Once we register these shares, they can be freely sold in the public market upon issuance and once vested, subject to a lock-up period and other restrictions provided under the terms of the applicable plan and/or the agreements entered into with the holders of these shares.

No public market for our Class A common stock currently exists, and an active public trading market may not develop or be sustained following this offering.

Prior to this offering, there has been no public market for our Class A common stock, and there has been no public market or active private market for our other classes of capital stock. Although we have applied to list our Class A common stock on the NASDAQ Global Select Market, an active trading market may not develop following the completion of this offering or, if developed, may not be sustained. The lack of an active market may impair your ability to sell your shares at the time you wish to sell them or at a price that you consider reasonable. The lack of an active market may also reduce the market price of your shares of Class A common stock. An inactive market may also impair our ability to raise capital by selling shares and may impair our ability to acquire other companies or technologies by using our shares as consideration.

If we are unable to implement and maintain effective internal control over financial reporting in the future, the accuracy and timeliness of our financial reporting may be adversely affected.

If we are unable to maintain adequate internal controls for financial reporting in the future, or if our auditors are unable to express an opinion as to the effectiveness of our internal controls as will be required pursuant to the Sarbanes-Oxley Act, investor confidence in the accuracy of our financial reports may be impacted or the market price of our Class A common stock could be negatively impacted.

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The requirements of being a public company may strain our resources, divert management’s attention and affect our ability to attract and retain qualified board members.

As a public company, we will be subject to the reporting requirements of the Securities Exchange Act of 1934, as amended, or the Exchange Act, the Sarbanes-Oxley Act, the Dodd-Frank Act, the listing requirements of the NASDAQ Global Select Market and other applicable securities rules and regulations. Compliance with these rules and regulations will increase our legal and financial compliance costs, make some activities more difficult, time-consuming or costly and increase demand on our systems and resources. The Exchange Act requires, among other things, that we file annual, quarterly and current reports with respect to our business and operating results.

We also expect that being a public company will make it more expensive for us to obtain director and officer liability insurance, and we may be required to accept reduced coverage or incur substantially higher costs to obtain coverage. These factors could also make it more difficult for us to attract and retain qualified members of our board of directors, particularly to serve on our audit committee and compensation committee, and qualified executive officers.

As a result of disclosure of information in this prospectus and in filings required of a public company, our business and financial condition will become more visible, which we believe may result in threatened or actual litigation, including by competitors and other third parties. If such claims are successful, our business and operating results could be harmed, and even if the claims do not result in litigation or are resolved in our favor, these claims, and the time and resources necessary to resolve them, could divert the resources of our management and harm our business and operating results.

We do not intend to pay dividends for the foreseeable future, and as a result your ability to achieve a return on your investment will depend on appreciation in the price of our Class A common stock.

We have never declared or paid any cash dividends on our common stock and do not intend to pay any cash dividends in the foreseeable future. We anticipate that we will retain all of our future earnings for use in the development of our business and for general corporate purposes. Any determination to pay dividends in the future will be at the discretion of our board of directors. Accordingly, investors must rely on sales of their Class A common stock after price appreciation, which may never occur, as the only way to realize any future gains on their investments.

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LETTER FROM OUR FOUNDER

Dear potential Zynga shareholders,

I’m proud and excited to be writing this letter to you today.

Zynga is a company with more than 2,500 amazingly talented employees dedicated to engaging, surprising and delighting an audience that has grown to 150 million monthly unique users in 175 countries. And because our users typically play more than one of our games each month, they account for 230 million “MAUs” (monthly active users). Our players create and store more than 35,000 virtual items every second and spend 2 billion minutes a day with our service. In just over 4 years, we’ve generated over $1.5 billion in revenue and over $2.0 billion in bookings.

We founded Zynga in 2007 with the mission of connecting the world through games. We believed play —like search, share and shop—would become one of the core activities on the internet.

Play is one of life’s big macros—it’s an activity people love to do and do often. Zynga was founded on a deeply held passion for games that family and friends play together—connecting, collaborating, gifting, bragging, nurturing, admiring and sometimes just doing silly stuff together. Reality is, we all wish we had more time to play together.

To put the play macro in perspective, games have become the second most popular internet activity based on time spent, and have even surpassed email. We’ve turned our rapidly growing base of smartphones and tablets into play devices. In fact, games are now the most popular category of apps on smartphones and represent nearly half of the time spent. But, Zynga has a lot of hard work, innovation and growth ahead of us to create a future where social gaming becomes a daily habit for nearly everyone.

Our strategy from the beginning has been to build the biggest macro bet on social gaming to provide our players with the most accessible, social and fun games. Despite our rapid growth, we have been careful to build for the long term. I’ve always thought of this journey as being a series of sprints that make up a marathon.

We raised hundreds of millions of dollars to maximize our ability to make large investments in teams, games and infrastructure. For example, our Chief Technology Officer joined us in the fall of 2008 with a mission of building the greatest data warehouse in the game industry, which now processes 15 terabytes of game data every day. We will continue to make these big investments and big bets in pursuit of our mission.

Our operating philosophies have been fundamental to our growth. They include:

Games should be accessible to everyone, anywhere, any time. From the beginning, we have strived to lower the barriers to play in people’s lives. We want to build games to play with our parents, our children, our co-workers and our best friends.

 

Games should be social. Every week our teams test new features to make our games more social. Historically, our players have created over 4 billion neighbor connections. And, our nearly 60 million daily active users interact with each other nearly 400 million times a day.

 

Games should be free. Free games are more social because they’re more accessible to everyone. We’ve also found them to be more profitable. We have created a new kind of customer relationship with new economics—free first, high satisfaction, pay optional. This model aligns shareholder value with delivering the best player experience.

 

Games should be data driven. Our culture combines the creative with the analytical. We develop and operate our games as live services with daily, metrics-based player feedback. This allows us to continually iterate, innovate and invest in the content our players love.

 

Games should do good. We want to help the world while doing our day jobs. Through Zynga.org our players have purchased social goods, raising more than $10 million for those in need from tornado-stricken communities in Alabama to earthquake survivors in Haiti. With programs like our Sweet Seeds for Haiti, our players have touched people around the world.

As we look to the future, we believe our core values will be key to our continued growth. Our goal is for everyone at Zynga to be a CEO with accountability and authority to drive important outcomes. It takes inspired

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people to make inspiring products. We’ve endeavored to create an environment that fosters intelligent risk-taking in order to invent bold beats—innovations that really advance the social gaming experience for our players. Our company is diverse, creative and entrepreneurial. I often describe Zynga as a confederation of entrepreneurs.

More specifically, our core values that make up these philosophies are:

Build games you and your friends love to play.

Surprise and delight our players.

Zynga is a meritocracy.

Be a CEO and own outcomes.