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McOsu
A free open-source circle-clicking rhythm game practice client for osu! beatmaps with Virtual Reality support. McOsu is developed separately from and has no direct affiliation with osu! or ppy Pty Ltd.
View on Steam ↗ Free (US · as of 2026-07-26)What players say
Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.
“[b][u]Note:[/u][/b] This review is not here to judge the gameplay of this title. Only the technical performance on weak hardware. Works wonderfully on older, obsolete and low-end hardware like my machine. Gameplay sessions averaged anywhere from 200 to 260 FPS, even with mods…”
— a player, Steam review · 0 hrs played“this ♥♥♥♥ so ♥♥♥♥♥♥♥ hard, thats what she saiddddd”
— a player, Steam review · 27 hrs played“i dont even play this game i just have it set so i play osu lazer lol”
— a player, Steam review · 14 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-07-24 00:27 UTC · history via SteamCharts.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Update (version 33.14)
- \ Starting with this version (33.14), the legacy 32-bit OpenGL build will only be used for VR - \ The Steam launch option "Play on Desktop" has been updated to use the 64-bit DirectX11 build for all
Update (version 33.13)
- Updated pp algorithm to better handle ScoreV2 cases for ScoreV1-based misscount estimation (thanks to @Givikap120!) - Updated pp algorithm to disable ScoreV1-based misscount estimation for all older
Update (version 33.12)
- For more info on the star/pp changes in this update see https://osu.ppy.sh/home/news/2025-10-29-performance-points-star-rating-updates - Updated star + pp algorithms to match current lazer implement
Update (version 33.11)
- For more info on the star/pp changes in this update see https://osu.ppy.sh/home/news/2025-03-06-performance-points-star-rating-updates - Updated star + pp algorithms to match current lazer implement
Update (version 33.10)
- Updated osu!stable database loader to support new 20250108 format (see https://osu.ppy.sh/home/changelog/stable40/20250108.3 )
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-20.
| Genres | Indie |
| Player tags | Rhythm · Free to Play · Anime · Music · VR · Indie · Difficult · Great Soundtrack · Psychological Horror · Singleplayer · Multiplayer · 2D (SteamSpy community voting) |
| Features | Single-player · Tracked Controller Support · VR Supported · Steam Workshop |
| Languages | English |
| Estimated owners | 1,000,000 – 2,000,000 (SteamSpy) |
| Official site | https://github.com/McKay42/McOsu |
Minimum system requirements (PC)
Minimum: OS *: Windows 7 Processor: Not a Potato™ Memory: 512 MB RAM Graphics: OpenGL 3.0 compatible Storage: 75 MB available space Sound Card: XAudio2 / DirectSound compatible VR Support: SteamVR. Standing or Room Scale