If it's crap ... We'll tell you
I say this because video games are mainly about the gameplay There are ways though I think with a good director and writer that you can find to make it work. Here are a couple of video games that I think would work on film.
1.Metal Gear Solid
Many games have potential to be great movies, but the problem is hollywood still doesn't take them seriously enough to give them the treatment/development they deserve. Take a look at Max Payne - just finished Max Payne 3 and that in itself is a better Max Payne movie than that Marky-Mark piece of shit could ever hope to be.
I'm hoping the Uncharted movie might change all that if they do it right, but that's a big if - they need to nail the script, cast, and get the right director.
I've also had high hopes for a Mass Effect movie, but I worry about it getting the budget to pull of the scope of that universe, and the news that it won't be about Shepard's story has already kinda ruined it for me.
Metal Gear Solid would not. It may have a great story line, but it has some very out-there villians and plots based in the modern world and it's history. Halo and Mass Effect would have an easier time since they both have their own expansive universes.
Good question, but here are my two cents, the problem is the structure of videogame plots. Books are stories and when condensed make for good screenplays, comics are visual stories and when well handled the comic can translate well to the screen, they're practically already storyboards.
But the problem is that a videogame will typically have either a cut scene or some on screen info setting up the reason for the protagonist to go from A to B, then the player plays, then another cut scene explaining why he should get from C to B. When we play the games we play them for the challenge of getting from A to B to C but when the movie gets made the finished product feels like the cut scenes back to back connected by action sequences.
Games don't translate to movies very well but you never know.
One of the biggest problems with video game movies is that Hollywood doesn't understand the games well, so the movie doesn't have the elements that make the games popular. At the same time, sometimes the movie DOES have those good elements, but never any real context for them. The problem is that filmmakers would have to find the balance between those 2 things, look at the Resident Evil movies.
They've already said that the movie won't be about Shepard, which I think is a huge mistake, kinda makes me wonder if the movie will even happen at this point with all the negative response to ME3. I guess they might try and tie it in to whatever Mass Effect 4 ends up being about instead.
A lot of the games that do not have an open world, Like Bioshock and Portal 2, are about moving through the story, and would make great movies. I would particularly want to see a Bioshock movie come out at the same time as Atlas Shrugged III. But there's something the filmmakers need to understand. Most of the dialogue in video games is directed at the player, and it's very stilted and purposeful exposition. We can't have dialogue in movies where characters go "This gun needs to be recharged by pressing R1. Can you do that to avenge your father who was killed by lord Yofar 12 years ago at the battle of Lalala?"
Also, most important, develop main character, instead of just making it "The man with no personality."