A Half-Lude movie project always crashes up against the hard reality that Gordon Freeman is a conduit for the player's senses," explains Marc Laidlaw, one of Valve's longest serving writers. "As soon as you try to turn him into an actual character, he loses whatever it is that makes him an interesting FPS protagonist.
Anybody from outside Valve who gets a hold of the project instantly turns Gordon into the perfect starring vehicle for that week's top celeb, and the arbitrary changes just get worse from there
The first Half-Life movie treatment pitched to us," reveals Laidlaw, "climaxed with a tearful reunion between enslaved Vortigaunts and their Vortiwives and children."
The last one I saw had Black Mesa invaded by a cavalry unit, just so as to feature a scene of bullsquids tearing into armored horses... Which I admit is sort of cool," Laidlaw concedes, "but it has nothing to do with Half-Life