Shack PSA: Left 4 Dead 50% Off on Steam

Continuing its tradition of weekend sales, Valve is now offering the PC version of Left 4 Dead for $24.99 via its digital distribution platform Steam, 50% off the usual price. nope Released this past November on PC and Xbox 360, Left 4 Dead packs four zombie-killing campaigns, playable in single-player or four-person coopertaive multiplayer, with two of those campaigns also playable in the competitive eight-player Versus mode.

A free update due out later this spring will add the ability to play the other two campaigns, Dead Air and Death Toll, in Versus, along with a new Survival mode.