Xbox LIVE's Major Nelson recently updated his blog with a list of the top 20 LIVE games for all of 2009 based on unique users and games purchased. The list spans not only full Xbox 360 games, but also arcade games, indie titles, and Games for Windows LIVE titles. Halo 3 remains king for Xbox 360 unique users and after only one month of being on store shelves, Modern Warfare 2 trumps Call of Duty: World at War. (Sorry Treyarch)

Follow the break for the full list:

Xbox 360 Top Live Titles (based on UU’s)

1    Halo 3
2    Call of Duty 4
3    Modern Warfare 2
4    Call of Duty: WaW
5    Gears of War 2
6    GTA IV (Purchase and download the full game)
7    Left 4 Dead
8    Halo 3: ODST
9    FABLE II Episode 1 (of 5)
10   バイオハザード５」デモ (BioHazard 5 -  Resident Evil 5)
11   Halo Wars - Demo
12   RESIDENT EVIL 5
13   Fallout 3
14   UFC 2009 Undisputed Demo
15   Left 4 Dead 2 - Demo
16   Gears of War
17   1 vs 100
18   Guitar Hero World Tour
19   Guitar Hero III
20   FIFA 09

Top Arcade Titles (Full Versions purchased)
Click a title to send a free demo to your Xbox 360 download queue
1    Battlefield 1943
2    Castle Crashers
3    Trials HD
4    Hasbro Family Game Night **
5    Shadow Complex
6    Marvel vs. Capcom 2
7    Magic: The Gathering
8    UNO
9    Worms
10   Peggle
11   Worms 2: Armageddon
12   Turtles in Time Re-Shelled
13   'Splosion Man
14   A Kingdom for Keflings
15   3 on 3 NHL Arcade
16   The Secret of Monkey Island: Special Edition
17   Teenage Mutant Ninja Turtles 1989 Classic Arcade
18   Marble Blast Ultra
19   Ultimate Mortal Kombat 3
20   Super Street Fighter II Turbo HD Remix

**Combined sales of all Hasbro Family Game Night titles

The above arcade list is based on full versions purchased.

Top Original Xbox Titles (based on UU’s)

1    Halo 2
2    Star Wars: Battlfrnt 2
3    Fable
4    Counter-Strike
5    Conker: Live Reloaded
6    Doom 3
7    Splinter Cell Chaos
8    SW: KOTOR
9    Star Wars: Battlefront
10    SW: Republic Commando
11    Burnout 3
12    Fable: Lost Chapters
13    Call of Duty 2
14    Call of Duty 3
15    Call of Duty Finest
16    MechAssault 2
17    Crimson Skies
18    Guilty Gear XX #Reload
19    Rainbow Six 3
20    Gauntlet Seven Sorrows

Top Indie Games (Full Versions purchased)

1    I MAED A GAM3 W1TH Z0MB1ES!!!1
2    Avatar Drop
3    RC-AirSim
4    Headshot
5    Miner Dig Deep
6    Rumble Massage
7    Who Did I Date Last Night
8    Kodu Game Lab
9    Avatar Golf
10    Aquarium HD
11    myFishtank
12    Head Shot 2
13    DrumKit
14    A Perfect Massage
15    The Impossible Game
16    Inside Lacrosse's CL2010
17    ZP2K9
18    ezmuze+ Hamst3r edition
19    The Drinking Game
20    Physics Sandbox

Top Games For Windows LIVE (based on UU’s)

1    GTA IV
2    Warhammer 40,000: Dawn of War II
3    Fallout 3
4    Shadowrun
5    Street Fighter IV
6    Halo 2 (PC)
7    Batman: Arkham Asylum
8    Resident Evil 5
9    Gears of War (Windows)
10    Red Faction Guerrilla
11    Battlestations: Pacific
12    Kane & Lynch: Dead Men
13    DiRT 2
14    Section 8
15    Quantum of Solace PC
16    FlatOut UC (PC)
17    Fuel
18    Viva Piñata
19    SWTCW: Republic Heroes
20    Juiced 2: HIN