The title has already notched up an impressive record online, too. Since the game went on sale in the US on November 7th, the rate of Xbox Live Gold subscriptions has increased by over 50 per cent.
Microsoft estimates that more than 850,000 gamers have entered into over 10 million gameplay sessions, unlocking seven million achievements, and that over 85 per cent of those that have bought a copy have entered into one of Gear’s multiplayer modes.
"From the very beginning, we knew Gears of War would be an industry-defining hit," said Shane Kim, corporate vice president at Microsoft Game Studios.
"As we watched both the game and its hype grow, it became obvious that Gears of War was the rare title that could live up to such incredible anticipation, and judging from the reaction of critics and fans, it’s done just that."
Gears entered the UK ChartTrack All Formats Chart at number one yesterday, becoming the second fastest Microsoft title ever released behind Halo 2 on the original Xbox.
The title also helped push the UK software market to its highest value this year.