Hvad er den største sælgende videospil af alle time

Call of Duty-serien (PC, PS3, XBOX 360, Nintendo Wii) Call of DutyCall of Duty 2Call of Duty 3Call of Duty 4: Modern WarfareCall of Duty: World at WarCall of Duty: Modern Warfare 2Call of Duty: Black OpsCall of Duty: Modern Warfare 3 (ikke frigivet indtil 9 november 2011)