McOsu

Free rhythm practice client with adjustable beatmaps and experimental modes

McKay · Released Mar 20, 2017

Reviews: Very Positive; 89% of 6,403
Recent reviews: Mostly Positive; 78% of 19 in 30 days
Playing now: 51; right now
Steam Deck: Untested
Last update: 7 months ago; Feb 20, 2026

What is McOsu?

This free, open-source, single-player rhythm practice client runs osu!(standard) beatmaps. You click circles in time with music and use speed, difficulty, scrubbing, and quick-save controls to practice specific sections; VR and first-person 3D variants are also included.

For you if...

+you want detailed practice controls for osu!(standard) beatmaps
+you enjoy difficult circle-clicking rhythm play
+you want VR or first-person rhythm variants

Not for you if...

−you need tutorials for your first osu! experience
−you primarily play mania, taiko, or catch beatmaps
−you want online rankings or multiplayer support

What players say

89% of 6,403 reviews are positive · 78% of 19 in the last 30 days

Players most often praise the practice tools, especially scrubbing, along with responsive play and good performance on older hardware. The most common complaint is difficult setup, with some players unable to load beatmaps or get controls to respond.