Call of Duty: Modern Warfare 2 wasn't the only game to sell big in November.

Valve said Tuesday that its cooperative zombie shooter Left 4 Dead 2 shuffled two million units across the Xbox 360 and PC during the last two weeks of November. That's more than double the sales the original Left 4 Dead managed over the same period last year.

More than a few Black Friday deals offered deep discounts on the game, some knocking the price as low as $35.

Valve also said that news about the first batch of downloadable content for Left 4 Dead 2 will be coming soon. Perhaps we'll be finding out whether this Midnight Riders website is more than just a way to sell T-shirts.

Image courtesy Valve

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