Sony has released a mod for Half-Life based on the upcoming movie Underworld. You can get it at IGN.com and probably somewhere else. I think this is a really cool idea, especially if it's good. Imagine if other film companies made things like this as ad campaigns for their films. I remember when Eight-Legged Freaks had a minigame sort of thing on it's site, but this seems to be the next level of quality in comparison.