EDIT: These should be either live action or 3D-animated films/shows, though. Not anime.
Heavenly Sword
Great storytelling, fascinating setting, engaging characters, mesmerising visuals. Heavenly Sword would be a great fit for a film or TV show. (And yeah, I know that there's already an animated Heavenly Sword film out there but that one is absolutely terrible and doesn't do the source material justice.)
Classic Tomb Raider
I've been thinking for a while now that you could make a great TV show based around the classic Tomb Raider games. Keep classic Lara's background intact, maybe have some childhood flashbacks to show how she never really fit in and her stuck-up aristocrat parents never really understood her, then document how she came to reject their lifestyle, got disowned and started travelling the globe in search of adventure. Oh and they should actually set the whole thing in the 80s/90s (with the childhood flashbacks taking place in the 70s, obviously) instead of trying to modernise it. Not sure how much of the game's actual storylines they should adapt, though. Most of them probably aren't a good fit for a TV show. I guess TR1's storyline could work with some significant changes, TR2's and 3's probably wouldn't but TR4 and AoD almost definitely would (again, with some changes). You could maybe do one adventure/treasure hunt per season so it'd be like:
Season 1: Childhood, plane crash, getting disowned, searching for the Scion (TR1).
Season 2: Some original adventure that wasn't in any of the games. (Maybe expand one of the flashback stories from TR5?)
Season 3: Unleashing and then trying to stop Seth (TR4).
Season 4: Running from the police and hunting the Cabal (AoD).
The Technomancer
This game has an incredibly interesting setting which you could do a whole lot of awesome stuff with. It wouldn't even necessarily have to follow the game's story (though the game's story isn't bad), there are a lot of different stories that could be told in Technomancer's world.
