I recently downloaded the soundtrack of one of my games and noticed it already is in MB: https://musicbrainz.org/release/3f9a8452-5768-412a-aa75-ad482b4ea2b9 . However, this game gets very regular updates (one every few months) that add new tracks to the soundtrack. Should there be one release that gets updated with the new tracks or should there be a new release each time new tracks come out?
I would argue (not sure if concrete guideline exists) a new release for each update. Adding a new release should be trivial if you just change the date and base it off an existing release.
Another option would be to make a release out of the new tracks.
This has been asked a couple times:
Usually a new release is added.
Sometimes I tag their RGs with updated release (note: not all of them have multiple releases yet)
Oh sorry! I did a quick search but it obviously was way too quick.