TEAM FORTRESS 2, PORTAL, AND HALF-LIFE 2 EPISODE PACK STAND ALONE RETAIL RELEASEPC Games From The Orange Box Flying Solo Into Retail April 9 and 11March 13, 2008 – Valve, creators of Half-Life® 2 and Counter-Strike®, today announce the retail launch dates for the stand-alone, PC versions of Team Fortress® 2, PortalTM, and the Half-Life 2: Episode Pack are April 9th in North America and April 11th around the globe.Portal – the unique single player game that mixes puzzle, adventure and first-person