Im not sure whether crysis 2 patches automatically or if i have to do it manually. If manually how do i patch it to verson 1.2? i dont know what to do :\

in the game directory of crysis2 go to-->>bin32, there you will find the exe. crysis2launcher.

use this to start the game it will look for a patch for the game. and download it and will ask you to patch it. after that just start the game.

If you still have problems you can download the patch manually (just click the Crysis 2 logo below)

add ur CD key to steam, thats how u patch it, it will autopatch , unless ur a pirate =.=
nahh im not a pirate