Half-Life 2: Episode One

First of three expansions to Valve's groundbreaking shooter is set for June 1 retail and online launch; sequels due by end of year and in 2007, respectively.

Gabe Newell confirms Valve already at work on its next-generation engine; details company's hardware plans and canned projects; rules out Steam exclusives.

First part of Source-powered community mod will be released next week; initial release will stop at Lambda Core level, offering 8-10 hours of gameplay.