Are we talking Multi or Single Player games? Guess it doesnt matter, multiplayer fps games on console is ughhhhhhhhhhh So here is some great singleplayer games.
Call of Juarez: Gunslinger
Metro: Last Light
Crysis 1,2,3
Deus Ex: Human Revolution
Fallout 3, New Vegas
Portal 2(?? :D)
Wolfenstein: The New Order (One of the best games of 2014 by far)
The only FPS I ever really cared about was the Borderlands series.
Borderlands 1 and especially 2 are pretty fantastic. BL1 is the reason I bought my 360. But don't bother with the "Pre-Sequel", they pretty much made it shitty.