Crysis Warhead updates and refines the gameplay of the original game through a sidestory plot involving Psycho, one of previous protagonist Nomad's allies. The game is a parallel story that follows Sergeant Michael "Psycho" Sykes, a character from the original Crysis, as he faces his own trials and challenges on the other side of the island during the time period of the first game.
It also showcases a new, enhanced and optimized version of CryEngine 2 using full DX10 extensions and is the first game developed by Crytek's Budapest studio.
Warhead has never been a great game when it comes to optimization. We can see the HD 4890 struggles at all resolutions with it not breaking 30 FPS in the minimum department at even the lowest resolution. The HD 5870 on the other hand sees some impressive gains and lets us play the game comfortably at not only 1680 x 1050, but also 1920 x 1200.