I'd link the Steam store page, but the website is currently down since so many people are trying to get it. So ya, L4D2, free on Steam until 10 am PST, December 26th. T'is truly a gaben Christmas.
indeed i've always wanted to play it even though i'm not big on that type of ZOMBIES!!! THATS RIGHT!! I CALLED THEM ZOMBIES!!!!
I wouldn't call it a gaben Christmas. A gaben Christmas would be giving out HL3. Seriously if you haven't bought l4d2 yet with how many times it's been $5 then you obviously didn't want it.