BioShock is the first-person shooter where everything is a weapon. Set in a failed underwater utopia, BioShock gives complete freedom to turn the environment, the enemies, even water and fire into powerful tools against your foes.
Pretty good deal for a 360 classic. $4.99 or 400 Microsoft points on the Xbox marketplace. Downloaded it and am playing it in anticipation of the new Bioshock coming out in about a month.