I have a few suggestions.
Under Best DLC the Noble Map pack from Halo Reach was a really good one.
Under Best Graphics Tech I was thinking Skyrim would be a good one for that since the amount of detail in such a huge game is very impressive.
Under Best Original Music Score Halo: CEA would be good (unless you don't want to add it because it's the same music from Halo CE)
Under Most Innovated L.A Noire might be a good fit because of how unique the game was with the facial stuff and I can't really think of any games like it out there.







