Games + Comics = Gamics
The Globe and Mail has an article about "gamics," or comics made out of screenshots from video games. Gamics.com conveniently hosts a whole crapload of them based on everything from "Lego Star Wars" to "The Simpsons," and while they're hit or miss overall, if you like "Half-Life" even a little bit you'll probably enjoy "Concerned: The Half-Life and Death of Gordon Frohman."
Want to make your own using your game of choice? The Comic Book Creator tool is now free online.