"I don' get why video game films are so hard to do, follow the source material and you'll be fine."

Video game stories just do not match up to movie stories. 99.9% of video game inspired movies would end up as unwatchable garbage if they followed the games script accurately. The remaining .1% would wind up as B-movies at best.

Edit: I admit there are a few games that could make good movies but they are few and far between. I can think of maybe 10 out of every game ever made. As good as alot of games stories may seem in the game, they would have a hard time holding up in film format. Interactivity plays a big part in how we perceive stories. The fact that most games follow a primary character very closely through every moment of the story while movies tend to jump back and forth between different scenes and characters at different times would break apart most game stories without some major alterations.

Infamous i cannot see how it would work other than as a "found footage" or bystander perspective type deal.

Uncharted would most likely turn into an Indiana Jones ripoff and even then it doesn't have nearly as much context as the Indiana jones films. It would need heavy script changes/additions.

Alan Wake i haven't got around to yet, so i couldn't really say.

I have to disagree, there's a lot of shit that gets made in Hollywood and there's been more video game stories recently which have impressed me more then films.

Infamous would make a good story with it's cool twist

Uncharted - Speaks for it's self

Alan Wake would make a nice story although I think it would be better as a TV series on Netflix.