Some of you are picking a bone with my complaint about the A.I. I didn't say the A.I. was bad, I said the enemies acted dumb. Yeah they could path around obstacles, but when it comes to a firefight they mostly just stand in place and attack you. The only real threats are the antlion minibosses and the elite soldiers (who are only threatening because they get alt-fire bouncy grenades.) The marines in Half Life had an easier time, since they were mostly in box filled warehouses or corridors, which allowed places to take cover and lob grenades from. The Half Life 2 combine police and soldiers are basically stuck in open empty rooms, which means they stand around and just fire at you, or worse they're standing next to stacks of explosive barrels. It's mostly the fault of the level design, which is more concerned with a cinematic experience than a fun firefight oriented FPS.