Valve has gotten into the holiday spirit by giving away its zombie killing multiplayer game, Left 4 Dead 2 for free, but for a very limited time. Steam announced that the game “will be free as in, grab it now, pay no money, and it is yours to keep – for free!”

Valve's generous gift of multiplayer fun is available for a very limited time. You'll need to grab it before 1 p.m. ET today, December 26. Users just need to search the game and install it, done! Here's a link to the game page.

Left 4 Dead 2 is playable on PC, Mac and Linux where four players cooperative to stay alive as a heavily armored squad of survivors stranded in the zombie infested US. The game offers hours of intense combat and terrifyingly gripping near-death moments. Left 4 Dead 2 is best played in co-op with people you know – to hear their screams mostly – so grab it and hound your friends to do the same. Watch out for the witch.

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[Via Steam]