F.E.A.R. enemies are very good for their time period, but there’s also quite a lot of smoke and mirrors involved that make them appear much smarter than they actually are. The voice lines are a great example, making you think they’re actually much more coordinated and intelligent than they are. The combat arenas are also very deliberately designed in tandem with the AI, both to maximise the efficiency of the AI that exists, but also to give them a bunch of opportunities to do manoeuvres that were unusual for the time - again to further the illusion. Good examples are ledges they can jump over and windows they can smash. It’s a much less smart and dynamic AI than it appears, but these small interactions give the impression of a highly intelligent enemy that interacts with the environment a lot.

They still do do some cool things sometimes though, like retreat and close the door behind them and wait in ambush.