Crysis 2 sucks ass compared to Crysis. As for the multiplayer, it seems that every player has a huge advantage over me. Fucking invisible sprinters shooting me with shotguns. I just can't get into it becasue it's so radicaly unbalanced.
Crysis 2 campaign is very linear, I just can't get myself to go through the entire thing as it's exactly what I did not expect from a Crysis game: Gameplay that limits my options severly. Now the first Crysis game was "linear" as well, but unlike its sequil Crysis does not severly restrict how I go about playing the game.
Point is, purchase the first Crysis becasue it's better.
EDIT: Whoops.