Call of Duty: Modern Warfare 2’s reign of terror on Xbox LIVE has come to an end.

After releasing in November 2009, it’s taken almost an entire year for another game to come along and successfully knock Modern Warfare 2 from the No. 1 spot on Xbox LIVE’s weekly activity ranking, and become the new most played game on the service.

Halo: Reach is that game.

After releasing on September 14th, Halo: Reach wasted no time in working its way up the listing, and this week sits at the No. 1 position on the chart. Will this be a lengthy stay, or will Modern Warfare 2 and Halo: Reach continue to swap positions leading up until the release of a new contender on November 9th: Call of Duty: Black Ops?

Lately, it seems as though the Halo series just can’t catch a break.

Looking at the rest of the Xbox LIVE Activity chart, Dead Rising 2: Case Zero is once again the best-selling Xbox LIVE Arcade game on the service this week, followed by newer releases DeathSpank: Thongs of Virtue and Plants VS. Zombies. The top-selling Xbox LIVE Indie games are Nuclear Wasteland, MILITARY SNIPER-SIM 3.18 and Ricochet Assassin.

The most played PC games over Games For Windows LIVE are Grand Theft Auto IV, Warhammer 40 000: Dawn of War II and a new release, F1 2010.

The full global list of top played Xbox Live games, top selling XBLA games, Xbox Indie Games and most played Games For Windows LIVE games follows below, all based on unique users and full versions purchased:

Xbox 360 Top LIVE Titles

• Halo: Reach
• Modern Warfare 2
  
• Halo 3
• Call of Duty: WaW
• FIFA Soccer 11 Demo
• FIFA 10
• Call of Duty 4
• Madden NFL 11
• GTA IV
• Red Dead Redemption
• Battlefield Bad Co. 2
• Gears of War 2
• Forza Motorsport 3
• Left 4 Dead 2
• NBA 2K11 Demo
• NHL 11
• Halo 3: ODST
• DEAD RISING 2: CASE ZERO
• Pro Evolution Soccer 2011 Demo
• NCAA Football 11

Top Arcade Titles

• DEAD RISING 2: CASE ZERO
• DeathSpank: Thongs Of Virtue
• Plants vs. Zombies
• Sonic Adventure
• LIMBO
• Trials HD
• SCOTT PILGRIM VS. THE WORLD: THE GAME
• Serious Sam HD: The Second Encounter
• Castle Crashers
• Lara Croft and the Guardian of Light
• Alien Breed 2: Assault
• Marathon: Durandal
• Space Invaders Infinity Gene
• Game Room
• Deadliest Warrior
• Monday Night Combat
• Shank
• UNO
• Peggle
• Magic: The Gathering

Top Indie Games

• Nuclear Wasteland
• MILITARY SNIPER-SIM 3.18
• Ricochet Assassin
• Baby Maker Extreme
• I MAED A GAM3 W1TH Z0MB1ES!!!1
• The Impossible Game
• Avatar Paintball
  
• Avatar Racedrome
  
• Try Not To Fart
• So Many Girls So Little Time
  
• Avatar Onslaught
  
• Avatar Drop
  
• Miner Dig Deep
  
• Avatar Ninja!
• Aurelia
• Action Arcade Wrestling
• Zombie Estate
  
• Head Shot 2
• radiangames Inferno
• Avatar Showdown
  

Games for Windows Top LIVE Titles

• GTA IV
• Warhammer 40,000: Dawn of War II
• F1 2010
• Colin McRae : Dirt 2
• Fallout 3
• Street Fighter IV
• Bioshock 2
• Resident Evil 5
• Halo 2
• Batman: Arkham Asylum
• Red Faction Guerrilla
• Gears of War
• Tinker
• Blacklight: Tango Down
• FlatOut UC
• Fuel
• Battlestations: Pacific
• Quantum of Solace
• SWTCW: Republic Heroes
• Section 8