Valve announced some statistics today that should be easy to remember. Left 4 Dead 2 has sold 2 million copies in its first two weeks.

It's not clear what the split is between the Xbox 360 and PC version's sales. Valve's generally tight-lipped when it comes to revealing sales figures for their PC games store Steam. That's par for the course with digital distributors, though.

At any rate, L4D2's two-week haul is twice what the original received. Does the game deserve its sales? Check out our review.