I don't like the idea of GTA as a movie at all. Been there done that with about a million other movies based on crime sprees (Gone in 60 Seconds?). Mass Effect is absolutely a series that should be made and the original story should be followed as it was told in the game but I imagine it would have to be a HUGE undertaking and should be done much like the Lord of the Rings. Filmed back to back to back as a 3 part trilogy and released within of 6 months - 1yr of each other.

Nothing from Nintendo should ever be attempted.

Metal gear Solid could make for a great movie franchise but Kojima is gonna have to be part of that to help the writers make sense of alot of shit in that story that just gets too confusing otherwise it'll lose its chance immediately.

Fallout to me seems more like a series that should be done as a TV show by AMC, Showtime or HBO that way they don't have to rush anything in a 2hr long movie and they can still keep some of the dirty gritty atrocities that would surely be part of that world.

First, MGS? You kinda already have MGS movies. Escape from LA and Escape from New York. Those are what inspired the MGS franchise.

I agree about Dead Space, if you're going to do it, make it a psychological horror film. That could be good. I'm not too big on space films, but I'm sure Mass Effect would make a good one.

Alan Wake and GTA would probably suck.

Oblivion and Fallout? Maybe, but they'd probably be pretty "eh". They, like GTA, are just too open to adapt well.

Also, I'd like to say, I actually enjoyed most of the Resident Evil movies. Tomb Raiders I liked for the most part as well. Silent Hill I liked. Hitman and the original Mortal Kombat weren't so bad either. And Prince of Persia wasn't horrible.

Now, some that should be mentioned on this list rather than the ones above (nor do I have any desire to see a Gears or Halo movie either--also Dead Rising is way too generic to adapt into a movie). Myst, I think that could be adapted into a good movie. Ico or Shadow of the Colossus. Uncharted (of course they're working on that). God of War (wait you mentioned that, plus they've been talking about it). Kingdom Hearts, Devil May Cry, Ninja Gaiden, Castlevania.

I would put Zelda right up there towards the top though.