While it may be from/made for a video game; wouldn't you think it'd also fall under the appropiate music genres?
For example, sonic 2 dreamcast has a few songs that can be classified as pop.
And what about some RPG's that really go deep with the music; such as Valkyrie Profile?
http://www.youtube.com/watch?v=AOe1tm-lJ4Y
http://www.youtube.com/watch?v=l1ADL...eature=related
http://www.youtube.com/watch?v=csrmyv09y9g