It goes without saying – If you have to ask, then you don’t understand. The recently announced official website for Half-Life 2: Episode 1. The game hits stores (and Steam) on June 1st. The video says it all. God bless Valve. The A.I. in the Source engine has been bumped, providing even more realistic interaction with the NPCs. Also to be included in this release is the much touted HDRI technology.