Some CODs were great, but the series has become very stale at this point. Too much of the same exact thing. Halo was great through most of their games. Although I don't really like the multiplayer besides SWAT. Way too high of a ttk with those shields. The first Gears was great. Second wasn't bad. Didn't care for the rest. I've only played one of the FF games, so no real opinion there. I enjoyed all 3 Bioshocks quite a bit. Great stories. Battlefield was amazing in its earlier games. BF2 is one of the greatest FPS multiplayer games I have ever played, but their more recent games kinda sucked or were lackluster (I play them on the PC where they were meant to be played). So I'd have to say Bioshock or Halo tbh if I had to choose from this list.