Xbox Live user and sales data recently unveiled on Major Nelson's blog shows Halo 3 (Xbox 360) at the top of the heap in terms of unique users through 2007, while TMNT 1989 Arcade (XBLA) won the #1 spot in sales of downloadable games on the platform.

Released in March, TMNT 1989 Arcade beat out Worms, Bomberman Live, Uno and other marquee releases for top sales on Xbox Live Arcade. Halo 3's lead in regards to unique users online was followed by Gears of War and Call of Duty 4 as second and third place, respectively.

Perhaps not surprisingly, the data also lists Halo 2 retaining its place as first on the list of the most-played original Xbox titles. A complete list of the top titles in all three categories follows.

2007 Top Xbox 360 Titles (Unique Users)

1. Halo 3
2. Gears of War
3. Call of Duty 4
4. Tom Clancy's Rainbow Six Vegas
5. Call of Duty 3
6. Crackdown
7. Oblivion
8. Guitar Hero II
9. Forza Motorsport 2
10. Lost Planet

2007 Top Xbox LIVE Arcade Titles (Sales)

1. TMNT 1989 Arcade
2. Worms
3. Castlevania: SOTN
4. UNO
5. Bomberman LIVE
6. 3D Ultra Minigolf Adventures
7. Sonic The Hedgehog
8. Pinball FX
9. Geometry Wars Evolved
10. Texas Hold 'Em

2007 Top Original Xbox Titles (Unique Users)

1. Halo 2
2. Star Wars: Battlefront 2
3. Counter-Strike
4. Battlefield 2: MC
5. Doom 3
6. Forza Motorsport
7. Madden NFL 07
8. Conker: Live and Reloaded
9. Call of Duty 3
10. Rainbow Six 3