Valve has turned down movie offers for Half-Life, Left 4 Dead
There are quite a few video game movies in the works, from
Assassin's Creed to Mass Effect, and even Angry Birds. But if
you were hoping for a movie adaptation of Half-Life or Left 4
Dead any time soon, don't hold your breath.  Valve has rebuffed
Hollywood a few times for not understanding the passion behind
the games and being able to translate that passion in the ideas
presented, Valve chief Gabe Newell said in talking to on The
Nerdist podcast (via Polygon). "There really were people who
came to us with proposals of: ‘Okay, it's Half-Life 1, and there
are horses, and it's a cavalry charge, and it's high-tech carbon
armor on the horses,'" Newell added. "And we were like, ‘What
the f*** are you talking about? Have you even played this?'"
Newell said Source Filmmaker was a response to these poor
pitches, allowing gamers to be able to show their passion is
their own movies. He also said that Valve is using the tool
itself to create a 15-minute Tea