Steam has the much-loved zombie shooter Left 4 Dead on sale this weekend only for $25 instead of the usual $50.

Did you guys know that Mike Patton (of Faith No More) does the voices for the "Infected" characters in the game? I've never played it, since scary games give me scary dreams, but since I found that out I've been singing 'Epic' in my head. Want to share my rock-rap pain? [Steam]