Valve has turned down movie offers
Not going to be a Half-Life movie unless they make it
In fact, the company has been pitched multiple times on the idea of making a movie out of Half-Life. The problem with these pitches was that the stories were so bad, and they lacked an understanding at the core of what the game was all about. After a number of these meetings, a decision was made… if there was a company to get the rights to make a Half-Life movie it would be Valve. In fact, if there is going to be a Half-Life movie, Valve will make that movie itself.
Good for Valve! That is what we say. Maybe we can be saved from another video game that is turned into a movie that is so bad we can’t bear to watch it. You can read more here.