Condemned 2: Bloodshot is a very worthy sequel to one of the best launch games of the Xbox 360. The atmosphere and mechanics of the game will have you thrown into a world which will, to be quite honest, scare the crap out of you on many occasions. The great story, and enjoyable single-player experience make this survival/horror action hybrid a winner on the Xbox 360. Fair warning, if you play at night make sure you have someone on private chat to talk to, otherwise you may not be able to fall asleep after.
This one is not recommended for those weak in the knees.