Call of Duty world at war is basically the same as moden warfare but with new models and maps.

Farcry 2 is truely awsome with amazing graphics. It does take a lot of bullets to kill someone but other than that its incredibly realistic. The guns de-grade the more you use them and if your shot to heal yourself you can scoop out the bullet with a knife or plyers etc. Multiplayer is good fun with cool unlockables.

Overall it depends on what sort of thing you prefer.