Early Half-Life Content
Pre-release Half-Life Content Archive
Collection of pre-release Half-Life stuff and references to pre-release Half-Life stuff.
Interviews of and letters from Valve employees.
Unused textures, models, sounds and code found in the main game, Day One, Source and the SDK.
Videos, GIFs and screenshots of the Alpha.
Scans of ads from gaming magazines.
Issue 6 of "The New Adventures of Dank and Scud", which takes place in an early Half-Life universe.
Originally hosted at Megaupload, and linked to by Half Life Beta Revealed.