@ Mitsurugi
In any case Killzone 2 was voted as having the best game AI at AiGameDev.com:
"The AI in KILLZONE 2 in particular shines in the Skirmish mode where you can play with computer-controlled bots in large open maps designed for multiplayer, and free of scripts and trigger boxes. The bots were intended for offline play where you have 7 bots on your side against 8 enemies, but you can also compete online with your friends against various combinations of bots."
Regarding the buddy system: "Cooperative buddy AI that accompany you through the game (while actually fighting alongside you) is generally a hard problem that nobody has got entirely right to-date, and there's still room for improvement in Killzone 2's buddies. However, it's one of the best attempts yet and given the underlying engine there's even more potential. In particular, there's a balance to be found between the aggressiveness that can save you in tricky situations vs. buddies playing safe so you don't need to revive them too often."
