Halo 4 - 8/10; Fun multiplayer and the gameplay is still mostly the same which is appreciated. Haven't touched the campaign yet, but i don't expect that to change my rating (for the worse).
Darkness 2 - 7/10; It would get an 8 but my god is it short. Perhaps playing it in co-op will boost the rating.
Borderlands 2 - 9/10; My GOTY so far without a doubt. Improved everything from the first except for the longevity for me personally.
Prototype 2 - 8.5/10; I had a lot of fun with this game. I enjoyed some of the new abilities and things. James Heller is pretty badass as well.
Syndicate - I'm not sure i can rate this one. I've only played it for about two hours or so. The gameplay was solid and the co-op is good but I haven't seen enough of it to be fair to the game. Part of that has to do with it not being able to pull me back in after the first time playing.