"An album or record album is a collection of related audio or music tracks distributed to the public."
Maybe I'm more relaxed about it, but I think it's valid.
The tracks are presented together in a collected way, they're all from the same game, they're all complete tracks rather than snippets/demos, there's a substantial amount of material, and the tracklist is essentially fixed/final. To me that's all good, but I'm just one opinion.