Apparently, a lot of the custom maps for the Half-Life 1 mod Action Half-Life (download links here), especially those done by enigmatic mapper Hondo, had enormous hidden areas that in some cases dwarfed the actual level. Rock Paper Shotgun has a NGJ-style account of an effort by a group of people to unlock the secrets of one of Hondo's most infamous maps: AHL_5AM.
posted by Pope Guilty on Mar 31, 2010 - 48 comments

Portal's "Still Alive." The man who wrote it. The woman who sang it. The official skinny, with lyrics and chords. A music video parody. On piano, guitar, and Garry's Mod. Its place in video game history. And finally, one or two ways to get it. (Spoilers all.)
posted by Soup on Nov 6, 2007 - 121 comments

Welcome to the Aperture Science Enrichment Center. Remember our motto: "There's a hole in the sky, through which things can fly." (Coming soon.)
posted by nervestaple on Jul 20, 2006 - 26 comments

Concerned (Half-Life 2 comic)
posted by Protocols of the Elders of Awesome on Feb 27, 2006 - 38 comments

TODAY WE ARE BECOME GORDON FREEMAN. This is the best of the web if e'er there was one. Go play.
posted by Pretty_Generic on Nov 16, 2004 - 98 comments