I sold a few games, so I'll give another rundown of what Xbox games I have:

Halo (xbox1)
Halo 2 (xbox1)
Halo 3
Left 4 Dead
Left 4 Dead 2
LEGO Star Wars: TCS
LEGO Harry Potter: Yrs 1-4
LEGO Rock Band
Red Dead Redemption
Rock Band 2
Portal (DLC)
Perfect Dark (DLC)
TMNT Arcade (DLC)

Sold 3 games to get LEGO HP: Fable 2 (both my wife and I beat the crap out of it), R6: Vegas 2 (friend who had it sold his), and Ghostbusters (beat it).

Got LEGO Rock Band today. Can't beat paying $20 (+$10 to export) for 45 more songs, plus the option of rocking with LEGO Minifigs.

And I recommend Red Dead Redemption very highly. I don't get to play it much because my wife is usually playing it, and she's so far ahead of me in the story that I don't really have the motivation to play through all of the missions I know are coming.