[unaindz]

It's unfun if the AI feels like it's cheating.

In Counter Strike the AI can be super dumb and slow until progressively it becomes a dumb aimbot. It doesn't become a better player with gamesense ans tacticts, just raw aim (Try arms race if you wanna feel it yourself)

In Fear the AI is pretty advanced in a more organic way. It coordinates several enemies to locate you and engage with you in a way that sometimes feels totally human. That feels great and when you lose you try again thinking something like "I should have positioned myself better" instead of "I guess my aim is just not fast enough".

We just don't get enough of good AIs to know how good they can feel.