The soon to be released sequal (or sort off anyway) to Crysis, Crysis Warhead was revealed to PCGamer Mag. They interviewed Cevat Yerli: Crytek's co-founder and president. This is a short version.
This game will not be a sequel to Crysis nor will it be a stand alone expansion. It will be a full size game that will focus of the adventures of Psycho, a member of Delta Squad.
The game will have more story elements than Crysis, since it doesn't have a faceless main character. The main character will now have a distinct personality. Many cut-scenes will be from third-person and will show Sykes using his nanosuit in extreme ways. This is to help you use it more efficiently.
The game will run on the same engine, have the same items and let you fight the same enemies, but all of these have been ameliorated. The visuals in Warhead will be better than ever because of the new lighting system (Global Ambient Lighting). This will not require better hardware. Warhead will be easier to run than Crysis! There will be new weapons, such as the dual machine guns and grenade launcher, new vehicles such as, the ASR (armoured truck) and hovercrafts.
Yerli spoke of a new multiplayer mode but it hasn't been revealed. The AI in Warhead was made much better than the first game and the Koreans will be much smarter than ever. The aliens have gotten brain surgery too. They will now use tactics and formations.
This game has fix just about ever mistake from Crysis. Yerli believes that the fact that this game is so much better will prevent pirates from downloading the game.
This game is the proof that Crytek isn't abandoning us but if Warhead doesn't sell much because of piracy, we will be screwed.