Zynga is also introducing multiplayer gaming, starting with the game . It will extend the multiplayer feature to other games, including those outside developers host on the platform.

The Zynga With Friends network builds on early success of the gaming experience it has offered on Zynga.com , the company said. The features available to players on the Zynga.com website will now be expanded to players on Facebook or Android or iOS mobile apps. Developers will be able to access the features through the new Zynga API, the company said.

Zynga.com customized social streams for gaming, proposing new "zFriends," for example, based on similar gaming activity rather than shared social connections. The company says 70 percent of visitors to Zynga.com access the social stream it offers, which documents a user's gaming interactions. The stream will "soon" be available as part of Zynga With Friends, to game players on any device or platform, according to Manuel Bronstein, Zynga's general manager.

Zynga executive Rob Dyer, head of platform publishing, referred to a "separation of church and state" to assure developers that their ideas won't be poached. He also said Zynga is adopting a "very curated" approach for the platform, initially pursuing games that don't compete with its own offerings.

Roussos emphasized how technically difficult it is to deliver multiplayer gaming. At the busiest time of the day, Zynga games have as many active players as the city of Paris has residents, generating a million activities a second, Roussos said. Latency between server and client also presents a technical hurdle.