Borderlands 2 has become the best-selling launch week game of 2012 thus far.

Mass Effect 3 had held the record, but Gearbox Software's sequel beat the action RPG's launch week sales by over 4000 copies. Consequently, Borderlands 2 has topped the UK software sales chart.

The critically acclaimed FPS managed to outsell the launch week sales achieved by the original Borderlands by more than 4 to 1.

The Xbox 360 accounted for 71 percent of week one sales for Borderlands 2, while the PS3 accounted for 22 percent. PC, meanwhile, was responsible for seven per cent of sales, but that's likely to be higher when digital sales are factored in.

Borderlands 2's commercial success isn't too much of a surprise when its pre-sales are considered; the sequel became the most pre-ordered title in 2K Games' history, as well as becoming Take-Two's third most pre-ordered game.