The leaked version is a developer build, and contains all levels.
Additionally, multiplayer allegedly works, and the leak comes with a master key for online authentication.
Many of the features and inscriptions are not final, but the game is complete. Many pirates have noted there are resolution issues as well as bugs.
Electronic Arts has responded, and they are not happy:
Crytek has been alerted that an early incomplete, unfinished build of Crysis 2 has appeared on Torrent sites. Crytek and EA are deeply disappointed by the news. We encourage fans to support the game and the development team by waiting and purchasing the final, polished game on March 22.
Crysis 2 is still in development and promises to be the ultimate action blockbuster as the series’ signature Nanosuit lets you be the weapon as you defend NYC from an alien invasion.
Piracy continues to damage the PC packaged goods market and the PC development community.
Written by: Andre Yoskowitz @ 13 Feb 2011 0:33