As long as Uwe Boll doesn't direct it, I'd say Assassin's Creed would make a pretty cool movie. And I didn't like Assassin's Creed at all (but that was the gameplay not the story).
Edit: I would say Mass Effect but there is too much to fit into one movie to make any coherent sense. Maybe if they took each sub-mission as it's own movie but then it would lose the epicness of it, so...meh.
Edit: I would say Mass Effect but there is too much to fit into one movie to make any coherent sense. Maybe if they took each sub-mission as it's own movie but then it would lose the epicness of it, so...meh.