From Badass Digest:
The screenwriter of the Oldboy remake explains his attempt at writing a Mass Effect movie, and what went wrong.
Why Mass Effect Will Be The Only Video Game Movie Mark Protosevitch Writes
There has been a Mass Effect movie slowly wending its way through the Hollywood system for a number of years, and at one point Mark Protosevitch was brought on to write it. Protosevitch is the writer of the upcoming Oldboy remake, but you have also seen his credit on films like I Am Legend and The Cell. Whenever Mass Effect does arrive as a movie you probably won't be seeing his credit on it.