Halcyon Halcyon is a custom server for the rhythm game osu!, featuring tons of unique features! We provide an nice, safe, unique place for everyone to enjoy, providing a wide variety of new experiences and features. We have anything ranging from custom map ranking and clans to dedicated leaderboards and PP systems for the mods of Relax and Autopilot and our feature set grows daily!
Why hesitate? Join Halcyon now!