Biography
This is a non-artist that is incorrectly used, usually for songs that are of video games, and sometimes remixes of songs that the user was unable to identify or locate the artist and must name "video games". It's not an artist or a group nor a dj. It's just like an ost but with no artist.
If this non-artist appears in your lists please do yourself and Last.fm a favour and fix your tags.
Biography text from Last.fm, available under CC BY-SA.