Pretty much everything about this game. The Graphics, the game play, really cheap AI, the music, bugs, etc.
There are very few games I have played that completely suck as a whole thing. Most bad games have a redeeming quality about the (except RC stunt copter) but this game has no redeeming qualities too it. The graphics are terrible. No matter how you have the settings adjusted, it still looks like an early wolfenstein game. However, comparing this game with wolfenstien insults wolfenstein. The music is terrible. The AI can be really cheap. Basically, they can hit you before they can even see you. The controls are kind of OK, but they aren't very accurate.
This is one craptacular game. The store should pay you for picking up this piece of garbage.