crysis warhead has more varience. eg with the first crysis the 1st half was spent shooting the koreans and the 2nd half was pretty much all aliens with warhead you get some koreans followed by some aliens followed by koreans again, also seemed faster paced. i found warhead single player a bit too short though it was shorter than the original im sure - i like the multiplayer crysis wars though included with warhead you get team deathmatch as a new mode, not sure what else it different as i never really played the first crysis multiplayer.