Looks like the boycott of thousands turns into the profit of millions for Valve, as it’s second infection of both the 360 and PC with Left 4 Dead 2 has already surpassed the 2 million units sold mark after only 2 weeks on shelves. Boosted by North America’s “Black Friday” buying frenzy and its $25 million advertising push, the tabulated sales don’t even include the copies sold on digital distribution platforms like Valve’s own Steam.

“Left 4 Dead 2 is off to a great start with strong support at retail and great reviews from the press,” said Doug Lombardi, VP of marketing at Valve. “Meanwhile the title has already been played by over 1 million Xbox LIVE Gold account holders, and news regarding L4D2 DLC 1 is coming very soon.”