osu! is a game that is already on Metafy, but there are actually 4 gamemodes total, each basically being a different game entirely. The main gamemode is the game we know as "osu!", and the official names of the other gamemodes are:

osu!taiko

osu!catch

osu!mania

For people who want to coach these other gamemodes, there should be separate game listings so that people can find the coaches they're looking for more easily.