It'd be a great movie. Actually, if they took out the health bar and plasmid bar then they could probably play the game and act like it was the movie, but they would also need to add cut scenes. Idk. But i would watch the movie for sure.

This is a "fan-made" half life shortmovie for all you fans.. check it out! It's cool grapichs and real footage! about 5 min and this is part one, part two is being produced right now! But it take's a while to load! so bewere

http://www.purchasebrothers.com/Purchase-Brothers-v2-hl.html

Its not possible. Its happening. Gore Verbinski's directing it.

Don't know what to make of it, my favourite game being made into film form by the director of pirates of the caribbean. That game takes me places, but will the film?

There is a movie in production.
Gore Verbinski is director, he also did Pirates of the Carribean and The Ring.
http://www.imdb.com/title/tt1230526/
Here's an IMDB link for your convenience.

Unfortunately production has been a bit delayed, but at the moment it's still going ahead. They're finding ways to cut costs so they can continue filming.

Personally, i'm looking at it optimistically; they've got a good director and the writer of Bioshock, Ken Levine is doing the story. So it's not like it's Uwe Boll or anything, it's a good director with experience, and people involved with the game.
SHOULD be atleast, watchable.