Every game (especially third person shooters) claims to have the "X" factor that distinguishes them from the run of the mill running and gunning games. There are however games that have defined this genre. Gears of War is looked up to as a cover based shooter genre-defining game.
Gravity mechanics in gameplay are interesting; Copy of Gears of War; Familiar territory for action game lovers
Game lacks overall polish; Uninteresting multiplayer; Enemies are too repetitive