What is the most successful Xbox game, in terms of sales?
Halo 2
Halo 2
Halo 3
Halo 2
Halo 3
Halo 2
Halo 3
Halo 2
Call of Duty 2
Halo 3
Halo: Reach
Halo 2
Call of Duty 2
Halo 3
Halo: Reach
Halo 2
Call of Duty 2
Halo 3
Halo: Reach
Halo 2
Halo 3
Call of Duty 2
Call of Duty 3
Halo: Reach
Call of Duty
Halo 2
Halo 3
Call of Duty 2
Halo
Call of Duty 3
Call of Duty
Halo: Reach
Halo 2
Halo 3
Call of Duty 2
Halo
Call of Duty: 2
Call of Duty
Call of Duty 3
Halo 2
Halo: Reach
Halo 3
Call of Duty 2
Halo
Call of Duty: 3
Call of Duty
Halo 2
Call of Duty 3
Halo: Reach
Halo 3
Halo 4
Halo
Call of Duty: 2
Call of Duty 2
Call of Duty
Halo 2
Call of Duty 3
Halo: Reach
Halo 3
Halo
Halo 4
Call of Duty: 3
Call of Duty 2
Call of Duty
Halo 2
Call of Duty 3
Halo: Reach
Halo
Halo 3
Call of Duty: 2
Halo 4
Call of Duty 2
Halo 5
Call of Duty
Halo 2
Halo
Call of Duty 3
Halo: Reach
Halo 3
Halo 4
Halo 5
Call of Duty
Halo 2
Halo
Call of Duty 2
Call of Duty: 2
Call of Duty 3
Halo: Reach
Halo 3
Halo 4
Tomb Raider
Halo 5
Call of Duty
Call of Duty 4
Halo 2
Halo
Call of Duty 2
Halo 3
Call of Duty 3
Halo: Reach
Halo 4
Tomb Raider
Halo
Halo 5
Call of Duty
Call of Duty: 2
Halo 2
Call of Duty 4
Gears of War
Halo 3
Call of Duty 3
Halo: Reach
Call of Duty 2
Halo 4
Madden NFL 07
Tomb Raider
Halo
Final Fantasy XIII
Halo 5
Call of Duty
Halo 2
Call of Duty 4
Halo 1
Gears of War
Halo 3
Call of Duty 3
Halo: Reach
Halo 4
Call of Duty 2
Halo
Final Fantasy XI
Call of Duty: 2
Madden NFL 07
Tomb Raider
Halo 5
Call of Duty
Final Fantasy X-2
Halo 2
Final Fantasy XV
Call of Duty 4
Halo 1
Gears of War
Halo 3
Dead or Alive 5
Gears of War 2
Halo 4
Halo
Call of Duty 3
Halo: Reach
Madden NFL 07
Tomb Raider
Halo 5
Call of Duty
Call of Duty 1
Call of Duty 2
Halo 2
Call of Duty 4
Halo 1
Call of Duty: 2
Call of Duty: 3
Halo 3
Halo
Halo 4
Gears of War 2
Call of Duty 3
Halo: Reach
Madden NFL 07
Halo 5
Call of Duty
Tomb Raider
Final Fantasy XIV
Call of Duty 1
Call of Duty 2
Madden NFL 06
Halo 1
Call of Duty 4
Halo
Halo 4
Call of Duty: 2
Dead or Alive 4
Call of Duty: 3
Call of Duty 3
Halo: Reach
Gears of War 3
Halo 5
Call of Duty
Madden NFL 07
Forza Motorsport 2
Tomb Raider
Halo 1
Halo
Madden NFL 06
Call of Duty 4
Call of Duty 2
Halo 4
Madden NFL 08
Call of Duty 3
Halo: Reach
Call of Duty 1
Halo 5
Call of Duty