Alright, I'll bite the obvious trolling east vs west line. Aaaaaand to side-step the whole myopia this community overall seems to suffer when it comes to western game genres and the disturbing lack of knowledge of games older than 5 years, I'll avoid the already mentioned AAA games (and that seem to be mostly console ones).
1) Amnesia, the Dark Descent
2) The Last Express
3) Grim Fandango
4) Gabriel Knight (any, choose, though GK2, being FMV live action and all is already a movie)
5) Sands of Time....oh wait, the movie has been done and it's pretty decent.
6) Dreamfall (since The Longest Journey is waaaaay too long to make into a movie)
7) Homeworld (and to a lesser extent, Homeworld 2)
8) Beyond Good and Evil
9) Starcraft: Brood War (there's quite a bit of betrayal and reversal of fortunes going on to make a good movie, and Jim Raynor is awesome there, with other magnificent roles all over the place)
10) Psychonauts (actually, any Tim Schaffer game sets down an incredible and unique universe to expand upon)
11) X-Com
12) Deus-Ex
err...should I go on? What universe is Bob living in?
I guess it's the same universe where either Mario or Zelda games have any plot or story worth expanding for 90 minutes, where Hideo Kojima's rambling and convoluted plots make any sense or don't come off as ludicrous, or..who's the other guy, Conan? Seriously? All of those may be noticeable gaming mascots but NONE work as detailed characters for a movie.