The realism in it. Unless you saw the video of the level before or knew about the level, you're going to go "WTF" when you play that level for the first time. When they went past the elevators, I thought we were going to join the security and fight some hijackers.
And then they opened fire. IW's got balls to pull that level off.
The PC version doesn't live up to its full expectations or potential.PS3 uses a P2P connection and works fine most of the time.
This kill
Shame about them copping out on the PC version because on consoles its a brilliant game. I enjoyed the campaign even if it was too short but Spec Ops and Multiplayer are superb.