Originally Posted by _fLaK_mOnKeY_
they cut it to 2 players because they wanted the player(s) to focus more on story and character development. but ironically enough the character development ultimately amounted to nothing anyway(I think I read that in the ign review, not certain though). not really sure why they made the same change on terrorist hunt. consistency perhaps? oh well. here's hoping a mod comes out that adds the other 2 slots, or perhaps more.
Negative - PC still supports 4 players in Co-Op. Take that Xbox360 beyatches!!!!
Doesn't seem to benedfit from SLI though.