For those who haven't seen it, go watch "Escape from City 17". I want to see something like that.
I agree that a halflife movie needs to get made. I would actually prefer to see a Diablo movie. They have so much material to draw from including the Sin War, the discovery of Sanctuary, the chases through the desert (I would love to see the scene where they bind Tal Rasha to the stone.), etc. It could be a great movie.
Lets not forget however that video game movies suck for a reason. Games are great because YOU get to do things. Why do you think Gordon Freeman doesn't talk? Or see Master Chief's face? When you watch a video game movie YOU aren't doing it anymore. The best video game movies I've seen have to be the Resident Evil movies and perhaps Doom. (they BUTCHERED the Doom story, but it was still a great action flick.) Pure action movies would be fine, pure action movies that follow the story of the game might be good but we've never seen one.