System Shock 2 was one of my favorite horror games of all time. I remember the beginning, where you wake up aboard a monster-infested spaceship, and the part where you reach the source of the voice that's been directing you to safety only to realize it was the rogue A.I. SHODAN the whole time. Unless System Shock 2 gets remastered sometime soon—which I fully support—there's a whole generation of gamers who will never experience this amazing game. As a film, it could reach a much larger audience that would've otherwise skipped it.
Have you ever wondered what would happen if Heavy Rain and Twin Peaks collided in a glorious explosion of creepy cinematic creativity? Neither have I, but if I had, I'd say the result would be something along the lines of Deadly Premonition. This was a highly underrated title that polarized critics. It's a game you either love or you hate, and I found myself blissfully frolicking into the former group. The characters are quirky and hilarious, and the story is surprisingly great. Unfortunately, the world is far too large and empty, it's not a very visually impressive game, and the combat is awful.
I don't usually watch people play video games, but I could easily dedicate an evening to watching someone play Dark Souls. I've played it and its predecessor, Demon's Souls, but I've never finished either. I think it's because I have a limit on the amount of abuse I can take from a game, and when it passes that threshold I have to put the controller down and walk away. As a film, Dark Souls could wow everyone with its gorgeous environments, monsters, and characters without asking them to climb that steep wall of difficulty the series is known for.