It hasn’t been a good week for Crytek and it’s about to get a whole lot worse.
After the news about Crysis 2′s textures being half the size of its predecessor it seems that Crytek doesn’t care about gamers hacking and cheating in Crysis 2.
Recently, there was a thread regarding the anti-cheat issue in Crysis 2 on the official Crytek forums and the developer moved quickly to take down the thread by closing it down.
However, they didn’t close down the thread, via GAF, which will be getting all the attention for those who are looking to hack and cheat in the shooter: the thread about the .pak extractor (which allows you to decrypt and extract the .pak files, and thus modify files and cheat) is still open. So, basically, if you modify any data file in Crysis 2 it will be accepted by the server without question.
http://vghq.net/2011/03/29/crytek-doesnt-care-about-cheatinghacking-in-crysis-2/