The controls are clunky and imprecise, the color palette makes Quake look vibrant, and the gameplay's is all about memorizing scripted sequences (ie which direction the Locusts will come from next). The crappy aiming is reminiscent of Metroid Prime (holding down a shoulder button to free aim? No thanks), and the one button cover mechanic always seems like its either too touchy or not responsive enough. It rarely feels just right because areas are either covered in cover points (gee, guess where the next sripted wave will come from?), or not enough (I was holding the button to run through an area and I kept getting caught and covering on the sparse cover points - I think the game figured if I was holding down the button, I wanted to cover on the nearest thing, even if it were 5 feet away). There is no AI to be spoken of. Enemie pop and shoot at you for a few seconds then just do a zig zag rush. Environmental interaction is zero. Throwing grenades sucks shit. This game sucks, and if it weren't getting hyped for the past year and a half, it would've gotten a 6, and 2 of those points would've been on the basis of it's coop and graphics.
The game. is. the. pits.