It's already taken the 10th spot for all-time best weekly sales for an individual title in Britain, with plenty more days left to burn through yet. Spartan!
As a whole the Halo franchise has sold 3.67m copies in the United Kingdom by the end of July 2010, cashing in a grand total of £109,068,532 at the time in the region.
"This is excellent news for the video games and interactive entertainment industry, demonstrating how games sales continue to increase despite difficult economic circumstances," said UKIE director general Michael Rawlinson.
"With one in every three people classifying themselves as gamers, and with over half of UK households containing at least one video games console, the UK video games market is in great shape for the future." It'd be in better shape if we got some tax breaks...