Valve doesn’t rule out another L4D2-like quick sequel in the future September 13, 2010 another doesn’t future L4D2-like Quick sequel Valve +
12 Months(Two Years) with Valve Corp. - by Curtis Turner September 12, 2010 Corp. Curtis Months(Two Turner Valve Years) +
PS3, Steam on PS3 “incredibly” important to Valve August 21, 2010 “incredibly” important Steam Valve +
