Major Nelson has announced the top list of games played while connected to Xbox Live for the entire year. Some interesting launch titles kept their positions near the top. Hexic HD, the game included with new 360s, has beat all but Gears of War to make its way to the number 2 spot.
The arcade list and top Xbox 360 titles may not match up correctly in relation to XBLA titles, because one (UUs) counts the number of gamertags playing a game, and the other counts the number of purchases. Many gamertags can play one purchased game. Also, since Hexic HD is free, it will show up with lots of unique users, and zero buyers.
(*Edit: the post has been corrected thanks to Gee - my online conscience)
Here are the lists:
2006 Top Xbox 360 Titles (UUs) 1 Gears of War 2 Hexic HD 3 Call of Duty 2 4 Ghost Recon 3 5 Oblivion 6 PGR3 7 Perfect Dark Zero 8 Call Of Duty 3 9 UNO 10 EA SPORTS™ Fight Night Round 3 11 Saints Row 12 Geometry Wars Evolved 13 DEAD OR ALIVE 4 14 Texas Hold 'em 15 Madden NFL 07 16 DEAD RISING 17 Need for Speed™ Most Wanted 18 Tom Clancy's Rainbow Six® Vegas 19 BFMC 20 Splinter Cell Double Agent
2006 Top Original Xbox Titles 1 Halo 2 2 Battlefield 2: MC 3 Star Wars: Battlfrnt 2 4 Madden NFL 2006 5 Counter-Strike 6 Splinter Cell Chaos 7 Forza Motorsport 8 Call of Duty 2 9 Ghost Recon 2 10 PGR 2 11 Rainbow Six 3 12 NFS Most Wanted 13 Ghost Recon 2: SS 14 Rainbow Six 3 BA 15 Ghost Recon AW 16 Far Cry Instincts 17 Madden NFL 07 18 Conker: Live Reloaded 19 Tony Hawk Am Wasteland 20 RS 4: Lockdown