To date, Activision's Call of Duty: Black Ops has become the UK's biggest selling game in history as confirmed by GfK ChartTrack.
Launching in November 2010, Black Ops has garnered 3,722,411 sales as of June 25 of this year, beating 2009's Call of Duty: Modern Warfare 2 which had 3,702,410 sales.
Whether you personally love it or hate it, no one can deny that people as a whole love them some Call of Duty action.