The Game Census
McOsu cover art

McOsu

McKay · 2017-03-20

Steam

Indie

Modes: Single player

Releases: Mar 20, 2017 (Mac), Mar 20, 2017 (PC (Microsoft Windows)), Mar 20, 2017 (Linux)

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.

McOsu is a free-to-play Indie game released in 2017, with an estimated 1,000,000 .. 2,000,000 owners and a Very Positive review sentiment (89% of 6401 reviews).

63
playing now
89%
positive of 6.4k reviews
Very Positive
steam's rating (official)
1,000,000–2,000,000
owners (SteamSpy est.)
platinum
deck/linux tier (ProtonDB)
Unknown
Steam Deck (Valve)
SteamOS: 0
Free
steam price (US)

63 players in-game as of 2026-10-14 11:00 UTC (census sample)

Trailer

McOsu trailer thumbnail

McOsu - Steam Game Trailer

≈5,517 YouTube results for this game's trailer search

Health check

Healthy
  • · 63 players in-game at the last census sample.
  • · 235 reviews in the last 8 weeks (~29/week).
  • · Review velocity down 18% vs the prior 8 weeks.
  • · Top 3% of 49,582 Indie games in the census by review count.

Review momentum

PositiveNegative
20520520182026Week of 2018-01-01: 40 positiveWeek of 2018-01-01: 4 negativeWeek of 2018-02-01: 40 positiveWeek of 2018-02-01: 7 negativeWeek of 2018-03-01: 40 positiveWeek of 2018-03-01: 9 negativeWeek of 2018-04-01: 19 positiveWeek of 2018-04-01: 2 negativeWeek of 2018-05-01: 33 positiveWeek of 2018-05-01: 6 negativeWeek of 2018-06-01: 20 positiveWeek of 2018-06-01: 6 negativeWeek of 2018-07-01: 46 positiveWeek of 2018-07-01: 5 negativeWeek of 2018-08-01: 30 positiveWeek of 2018-08-01: 4 negativeWeek of 2018-09-01: 22 positiveWeek of 2018-09-01: 3 negativeWeek of 2018-10-01: 18 positiveWeek of 2018-10-01: 3 negativeWeek of 2018-11-01: 64 positiveWeek of 2018-11-01: 5 negativeWeek of 2018-12-01: 20 positiveWeek of 2018-12-01: 9 negativeWeek of 2019-01-01: 23 positiveWeek of 2019-01-01: 6 negativeWeek of 2019-02-01: 22 positiveWeek of 2019-02-01: 7 negativeWeek of 2019-03-01: 26 positiveWeek of 2019-03-01: 1 negativeWeek of 2019-04-01: 23 positiveWeek of 2019-04-01: 5 negativeWeek of 2019-05-01: 29 positiveWeek of 2019-05-01: 4 negativeWeek of 2019-06-01: 80 positiveWeek of 2019-06-01: 7 negativeWeek of 2019-07-01: 107 positiveWeek of 2019-07-01: 13 negativeWeek of 2019-08-01: 19 positiveWeek of 2019-08-01: 8 negativeWeek of 2019-09-01: 22 positiveWeek of 2019-09-01: 4 negativeWeek of 2019-10-01: 38 positiveWeek of 2019-10-01: 3 negativeWeek of 2019-11-01: 93 positiveWeek of 2019-11-01: 8 negativeWeek of 2019-12-01: 59 positiveWeek of 2019-12-01: 3 negativeWeek of 2020-01-01: 37 positiveWeek of 2020-01-01: 8 negativeWeek of 2020-02-01: 48 positiveWeek of 2020-02-01: 4 negativeWeek of 2020-03-01: 52 positiveWeek of 2020-03-01: 7 negativeWeek of 2020-04-01: 62 positiveWeek of 2020-04-01: 4 negativeWeek of 2020-05-01: 49 positiveWeek of 2020-05-01: 7 negativeWeek of 2020-06-01: 81 positiveWeek of 2020-06-01: 5 negativeWeek of 2020-07-01: 81 positiveWeek of 2020-07-01: 11 negativeWeek of 2020-08-01: 65 positiveWeek of 2020-08-01: 9 negativeWeek of 2020-09-01: 64 positiveWeek of 2020-09-01: 3 negativeWeek of 2020-10-01: 78 positiveWeek of 2020-10-01: 4 negativeWeek of 2020-11-01: 101 positiveWeek of 2020-11-01: 9 negativeWeek of 2020-12-01: 93 positiveWeek of 2020-12-01: 10 negativeWeek of 2021-01-01: 132 positiveWeek of 2021-01-01: 16 negativeWeek of 2021-02-01: 143 positiveWeek of 2021-02-01: 10 negativeWeek of 2021-03-01: 171 positiveWeek of 2021-03-01: 18 negativeWeek of 2021-04-01: 175 positiveWeek of 2021-04-01: 16 negativeWeek of 2021-05-01: 205 positiveWeek of 2021-05-01: 22 negativeWeek of 2021-06-01: 174 positiveWeek of 2021-06-01: 16 negativeWeek of 2021-07-01: 191 positiveWeek of 2021-07-01: 16 negativeWeek of 2021-08-01: 183 positiveWeek of 2021-08-01: 10 negativeWeek of 2021-09-01: 115 positiveWeek of 2021-09-01: 13 negativeWeek of 2021-10-01: 116 positiveWeek of 2021-10-01: 15 negativeWeek of 2021-11-01: 159 positiveWeek of 2021-11-01: 14 negativeWeek of 2021-12-01: 110 positiveWeek of 2021-12-01: 13 negativeWeek of 2022-01-01: 114 positiveWeek of 2022-01-01: 20 negativeWeek of 2022-02-01: 84 positiveWeek of 2022-02-01: 13 negativeWeek of 2022-03-01: 98 positiveWeek of 2022-03-01: 16 negativeWeek of 2022-04-01: 89 positiveWeek of 2022-04-01: 17 negativeWeek of 2022-05-01: 78 positiveWeek of 2022-05-01: 13 negativeWeek of 2022-06-01: 89 positiveWeek of 2022-06-01: 16 negativeWeek of 2022-07-01: 93 positiveWeek of 2022-07-01: 18 negativeWeek of 2022-08-01: 86 positiveWeek of 2022-08-01: 7 negativeWeek of 2022-09-01: 51 positiveWeek of 2022-09-01: 17 negativeWeek of 2022-10-01: 64 positiveWeek of 2022-10-01: 15 negativeWeek of 2022-11-01: 79 positiveWeek of 2022-11-01: 12 negativeWeek of 2022-12-01: 50 positiveWeek of 2022-12-01: 14 negativeWeek of 2023-01-01: 74 positiveWeek of 2023-01-01: 14 negativeWeek of 2023-02-01: 58 positiveWeek of 2023-02-01: 13 negativeWeek of 2023-03-01: 69 positiveWeek of 2023-03-01: 14 negativeWeek of 2023-04-01: 54 positiveWeek of 2023-04-01: 13 negativeWeek of 2023-05-01: 55 positiveWeek of 2023-05-01: 8 negativeWeek of 2023-06-01: 44 positiveWeek of 2023-06-01: 5 negativeWeek of 2023-07-01: 59 positiveWeek of 2023-07-01: 10 negativeWeek of 2023-08-01: 46 positiveWeek of 2023-08-01: 4 negativeWeek of 2023-09-01: 47 positiveWeek of 2023-09-01: 6 negativeWeek of 2023-10-01: 45 positiveWeek of 2023-10-01: 10 negativeWeek of 2023-11-01: 48 positiveWeek of 2023-11-01: 7 negativeWeek of 2023-12-01: 39 positiveWeek of 2023-12-01: 8 negativeWeek of 2024-01-01: 36 positiveWeek of 2024-01-01: 11 negativeWeek of 2024-02-01: 34 positiveWeek of 2024-02-01: 5 negativeWeek of 2024-03-01: 47 positiveWeek of 2024-03-01: 6 negativeWeek of 2024-04-01: 34 positiveWeek of 2024-04-01: 8 negativeWeek of 2024-05-01: 37 positiveWeek of 2024-05-01: 10 negativeWeek of 2024-06-01: 41 positiveWeek of 2024-06-01: 11 negativeWeek of 2024-07-01: 40 positiveWeek of 2024-07-01: 6 negativeWeek of 2024-08-01: 48 positiveWeek of 2024-08-01: 6 negativeWeek of 2024-09-01: 45 positiveWeek of 2024-09-01: 5 negativeWeek of 2024-10-01: 33 positiveWeek of 2024-10-01: 6 negativeWeek of 2024-11-01: 36 positiveWeek of 2024-11-01: 9 negativeWeek of 2024-12-01: 38 positiveWeek of 2024-12-01: 6 negativeWeek of 2025-01-01: 45 positiveWeek of 2025-01-01: 6 negativeWeek of 2025-02-01: 37 positiveWeek of 2025-02-01: 7 negativeWeek of 2025-03-01: 49 positiveWeek of 2025-03-01: 5 negativeWeek of 2025-04-01: 26 positiveWeek of 2025-04-01: 5 negativeWeek of 2025-05-01: 29 positiveWeek of 2025-05-01: 6 negativeWeek of 2025-06-01: 38 positiveWeek of 2025-06-01: 9 negativeWeek of 2025-07-01: 41 positiveWeek of 2025-07-01: 6 negativeWeek of 2025-08-01: 36 positiveWeek of 2025-08-01: 3 negativeWeek of 2025-09-01: 22 positiveWeek of 2025-09-01: 4 negativeWeek of 2025-10-01: 21 positiveWeek of 2025-10-01: 8 negativeWeek of 2025-11-01: 30 positiveWeek of 2025-11-01: 4 negativeWeek of 2025-12-01: 28 positiveWeek of 2025-12-01: 2 negativeWeek of 2026-01-01: 18 positiveWeek of 2026-01-01: 7 negativeWeek of 2026-02-01: 28 positiveWeek of 2026-02-01: 6 negativeWeek of 2026-03-01: 18 positiveWeek of 2026-03-01: 5 negativeWeek of 2026-04-01: 22 positiveWeek of 2026-04-01: 4 negativeWeek of 2026-05-01: 24 positiveWeek of 2026-05-01: 8 negativeWeek of 2026-06-01: 38 positiveWeek of 2026-06-01: 2 negativeWeek of 2026-07-01: 23 positiveWeek of 2026-07-01: 2 negativeWeek of 2026-08-01: 13 positiveWeek of 2026-08-01: 2 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

89272026-09-15 12:00 — 59 players2026-09-16 20:00 — 89 players2026-09-18 04:00 — 56 players2026-09-19 11:00 — 67 players2026-09-20 19:00 — 84 players2026-09-22 02:00 — 49 players2026-09-23 10:00 — 40 players2026-09-24 17:00 — 89 players2026-09-26 01:00 — 57 players2026-09-27 08:00 — 46 players2026-09-28 16:00 — 75 players2026-09-29 23:00 — 48 players2026-10-01 07:00 — 34 players2026-10-02 14:00 — 75 players2026-10-03 22:00 — 50 players2026-10-05 06:00 — 35 players2026-10-06 14:00 — 67 players2026-10-07 21:00 — 71 players2026-10-09 05:00 — 38 players2026-10-10 12:00 — 70 players2026-10-11 20:00 — 63 players2026-10-13 03:00 — 47 players2026-10-14 11:00 — 63 players
Concurrent players, hourly average, last 30 days (census samples).
22221Mar 2017Aug 2026Mar 2017 — avg 49 · peak 164Jun 2017 — avg 23 · peak 48Sep 2017 — avg 21 · peak 50Dec 2017 — avg 28 · peak 61Mar 2018 — avg 29 · peak 65Jun 2018 — avg 27 · peak 55Sep 2018 — avg 30 · peak 63Dec 2018 — avg 24 · peak 50Mar 2019 — avg 32 · peak 69Jun 2019 — avg 39 · peak 68Sep 2019 — avg 44 · peak 81Dec 2019 — avg 48 · peak 84Mar 2020 — avg 52 · peak 92Jun 2020 — avg 83 · peak 137Sep 2020 — avg 91 · peak 159Dec 2020 — avg 106 · peak 172Mar 2021 — avg 189 · peak 305Jun 2021 — avg 214 · peak 318Sep 2021 — avg 180 · peak 285Dec 2021 — avg 188 · peak 276Mar 2022 — avg 177 · peak 272Jun 2022 — avg 162 · peak 233Sep 2022 — avg 144 · peak 229Dec 2022 — avg 143 · peak 232Mar 2023 — avg 136 · peak 209Jun 2023 — avg 128 · peak 194Sep 2023 — avg 113 · peak 185Dec 2023 — avg 108 · peak 170Mar 2024 — avg 97 · peak 150Jun 2024 — avg 95 · peak 152Sep 2024 — avg 96 · peak 150Dec 2024 — avg 85 · peak 131Mar 2025 — avg 91 · peak 149Jun 2025 — avg 79 · peak 134Sep 2025 — avg 74 · peak 125Dec 2025 — avg 69 · peak 109Mar 2026 — avg 64 · peak 113Jun 2026 — avg 68 · peak 108Aug 2026 — avg 64 · peak 116
Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

Details

WindowsLinuxSingle-playerTracked Controller SupportVR SupportedSteam WorkshopFamily Sharing3 DLC

1 supported languages: English

Post-launch support: 3 DLC released, first 2017-03-20 (Steam store data)

Where its players are

Share of Steam reviews by language (top languages measured) — a proxy for where the player base lives.

Player tags

2DVRFPSAnimeIndieMusicHorrorRhythmDifficultMultiplayer

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

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Similarity via IGDB.

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