Using HL2 as a "Canvas"

Interesting story on slash-dot. The comic Apostasy isn't bad.

Nearly six months since its release, Half-Life 2 is not only making ripples for its being a great game, but also for the works being made from the game itself. Garry's Mod (aka GMod) is a extremely popular and fun "sandbox" modification for Half-Life 2, that allows you to play with the game's exceptional physics engine as well as pose characters, create Rube Goldberg-type devices and other physics phun inside of HL2. Taking advantage of GMod's character posing, the compelling and professionally produced Apostasy is an online comic that follows 3 characters from the HL2 universe and is interwoven within and around the game's original narrative.