From Valve:
It's player-versus-player all week long with discounts and demos aplenty during Steam's PvP Fest!
From now through February 16th at 10 a.m. Pacific, grab your friends and turn them into enemies! Or grab your enemies and reinforce your big feelings about them! Or just play against pretend players! We don't judge!
See you over on Steam for Steam's PvP Fest!
