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A pink circle with the name on it.
The osu! logo since 2015
Osu!lazer screenshot.png
Screenshot of osu!lazer, the in development stage of an open source version of osu!.
Original author(s)Dean "peppy" Herbert
Developer(s)Osu! development team
Initial releaseSeptember 16, 2007; 14 years ago (2007-09-16)
Stable release20210821[1] (August 21, 2021; 2 months ago (2021-08-21)) [±]
Preview release2021.820.0[2][3] (August 20, 2021; 2 months ago (2021-08-20)) [±]
Written inC#
Operating systemMicrosoft Windows
Linux (open beta)
Android (open beta)
iOS (open beta)
Size146MB (osu!lazer)
Available in35 languages
TypeRhythm Game
LicenseFreeware (stable build)
MIT (osu!lazer/preview build)
Websiteosu.ppy.sh Edit this on Wikidata

osu! is a free-to-play rhythm game primarily developed, published, and created by Dean "peppy" Herbert, written in C# on the .NET framework.[5] Originally released for Microsoft Windows on 16 September 2007, the game has throughout the years been ported to macOS, Linux, Android and iOS. Its gameplay is inspired by other rhythm games, including Osu! Tatakae! Ouendan, Taiko no Tatsujin, Happy Feet, Beatmania IIDX,[6] Elite Beat Agents, O2Jam, StepMania and DJMax. The game is heavily community-oriented, with all beatmaps, the playable songs, being community-made through the in-game map editor.[7] Four different game modes exist, offering various ways to play a beatmap, which can also be combined with addable modifiers, increasing or decreasing the difficulty. The original osu!standard mode remains the most popular to date and as of 2021, the game has over 15,200,000 registered users.[8]

Gameplay and features[edit]

There are four official game modes: "osu!" (unofficially called osu!standard, abbreviated as osu!std), "osu!taiko", "osu!catch" (unofficially called "osu!ctb", or "catch the beat"), and "osu!mania".[9][10] Each mode offers a variety of beatmaps, playable songs ranging from "TV sized" anime openings to "marathons" surpassing 5 minutes. In osu!standard, beatmaps consist of three items – hit circles, sliders, and spinners. These items are collectively known as "hit objects" or "Circles", and are arranged in different positions on the screen at different points of time during a song. Taiko beatmaps have drumbeats and spinners. Catch beatmaps have fruits and spinners, which are arranged in a horizontally falling manner. Mania beatmaps consist of keys (depicted as a small bar) and holds. The beatmap is then played with accompanying music, simulating a sense of rhythm as the player interacts with the objects to the beat of the music.[11][12] Each beatmap is accompanied by music and a background. The game can be played using various peripherals: the most common setup is a graphics tablet or computer mouse to control cursor movement, paired with a keyboard[13][6] or a mini-keyboard with only two keys.

The game offers a buyable service called osu!supporter, which grants many extra features to the user. Players are able to download beatmaps directly from inside the game, without the lengthy process of using browsers through a service called osu!direct. A heart icon beside the username on the official osu! website, additional pending beatmap slots, faster download speeds, access to multiplayer on cutting edge builds, friend and country-specific leaderboards, one free username change, more in-game customization, a yellow username in the in-game chat, and more customization on one's user page (the "me" tab).[14] osu!supporter does not affect the ranking system, or provide any in-game advantage. osu!supporter is not a recurring service.

Community and competitive play[edit]

Community events[edit]

refer to caption
An audience watches players idke and RyuK compete at the osu! TwitchCon Booth in 2018

osu! also features different events, such as fanart and beatmapping contests. Unofficial events and conventions are also being held. The biggest unofficial event held in the community is "cavoe's osu! event"[15] (usually referred to as "osu! event" or "COE"), held at The Brabanthallen[16] in 's Hertogenbosch, The Netherlands. The event has been arranged three times since 2017 yearly. However, due to the COVID-19 pandemic, COE 2020 was cancelled. There were also official stands at TwitchCon and Anime Expo.


osu! contains three main facets of competition between players. In multiplayer lobbies, up to 16 users play a map simultaneously. On individual maps, players compete for highscores on global leaderboards or against highscores set by themselves and friends. Players also compete with their ranks, which are calculated by accumulating "performance points" (pp). pp is based on a map's difficulty and the player's performance on it.[17] According to PC Gamer, most competitive osu! players score between 100pp and 400pp as their highest on a map, with few ever exceeding 500pp. In July 2019, a player, Vaxei, exceeded 1,000pp for the first time, followed by another player, idke, less than twenty-four hours later.[18][19]

Since 2011, there have been nine annual "osu! World Cups" (usually abbreviated as "owc"), one for each game mode (osu!mania having two for four key and seven key). Teams for World Cups are country-based, with up to eight players per team.[20] There are also many different community-hosted tournaments, differing in rank range, types of maps played, and how the teams are composed.[21] Winners of tournaments typically receive prizes such as cash, merchandise, profile badges and/or osu!supporter subscriptions.



In 2011, osu!stream was released as an adaptation of osu! for iOS devices running iOS 6 and later, also developed by Dean Herbert. The main difference between osu! and osu!stream is that osu!stream beatmaps are not user-created and are instead made by the developers of osu!stream. The version also includes some new gameplay elements.[22]

On 26 February 2020, Herbert announced that he released the source code and plans to halt development of the game, releasing one final update that made all the levels free to download.[23]


A list of osu! beatmaps that contain detailed information about these songs and related statistics.
The osu!lazer song selection screen

osu!lazer[24] is a free and open-source remake of the original game client under heavy development. It was originally projected for the stable version to come out in 2017. However, as of February 2021, not all features were working.

The development of osu!lazer started in 2015 and development versions of osu!lazer are currently available for testing on Microsoft Windows, MacOS, Linux, Android, and iOS. osu!lazer is written entirely in .NET (formerly .NET Core).[25]

Related projects[edit]


osu!framework is an open-source game framework developed with osu!lazer in mind. The goal of osu!framework development is to create a versatile and accessible game framework that goes further than most, providing things out-of-the-box such as graphics, advanced input processing, and text rendering.[25]


McOsu is an open-source game client designed to play osu!standard beatmaps, available on Windows, Linux, MacOS, and the Nintendo Switch.[26]

The focus of McOsu is to provide an unofficial osu! client for practice, featuring tools that allow players to retry specific parts of beatmaps. McOsu also offers a virtual reality support.[27] This game client does not allow players to gain "performance points" or to increase their official ranking.


Jeuxvideo.com reviewed osu! favorably with 18/20 points in 2015.[28] In 2010, MMOGames.com reviewer Daniel Ball said that while the game was very similar to Elite Beat Agents, it was differentiated by its community's large library of high-quality community made content and customization.[29] osu! has been used and recommended by esports players such as Ninja and EFFECT, as a way to warm-up and practice their aim.[30][11]


  1. ^ "Stable Releases". ppy. Archived from the original on 23 July 2021. Retrieved 23 August 2021.
  2. ^ "Releases". GitHub. Archived from the original on 23 August 2021. Retrieved 19 August 2021.
  3. ^ "Lazer 2021.820.0 · changelog | osu!". osu.ppy.sh. Retrieved 23 August 2021.
  4. ^ "a long-overdue update". ppy blog. 30 June 2016. Archived from the original on 8 November 2020. Retrieved 20 August 2021. Until now we used some XNA code for input handling and low-level structs. These dependencies are almost compeletely removed from the project now, with OpenTK or similar open-source frameworks replacing them.
  5. ^ "Osu!'s programming language?". osu! Community Forum. Retrieved 27 July 2021.
  6. ^ a b Gonzáles, Mariela (5 September 2019). "Gaming Sounds: osu!, cuando el ritmo se convierte en nuestro séptimo sentido". The Objective (in Spanish). The Objective Media. Archived from the original on 7 January 2020. Retrieved 7 January 2020.
  7. ^ "Osu's legal copyright policy information page".
  8. ^ "Osu! home page".
  9. ^ Andika, Ferry (27 December 2019). "osu!, Game Rhythm Terkenal di PC dengan Ribuan Pemain Harian" (in Indonesian). Jakarta: Indozone Media Indonesia. Archived from the original on 7 January 2020. Retrieved 7 January 2020.
  10. ^ "Game Modes". osu.ppy.sh. Archived from the original on 21 November 2019. Retrieved 15 August 2019.
  11. ^ a b Rodrigues, Gabriela (19 September 2019). "Como baixar osu! e treinar sua mira no Fortnite e CS:GO". TechTudo (in Portuguese). Rio de Janeiro: Globo Comunicação e Participações S.A. Archived from the original on 7 January 2020. Retrieved 7 January 2020.
  12. ^ Phúc, Thịnh (30 August 2019). "Bí quyết giúp game thủ có khả năng phản xạ chớp nhoáng". Zing.vn (in Vietnamese). Archived from the original on 7 January 2020. Retrieved 7 January 2020.
  13. ^ Smart, Jibb (17 September 2019). "Why not just use thumbsticks?". Gamasutra. Archived from the original on 7 January 2020. Retrieved 7 January 2020. While there's debate among its fans as to whether playing with a mouse is as good as playing with a stylus, there's one thing everyone will agree on: thumbsticks are almost useless for this game.
  14. ^ "Support the game". osu.ppy.sh. Archived from the original on 12 August 2019. Retrieved 12 August 2019.
  15. ^ cavoeboy. "COE2020". cavoeboy.com. Archived from the original on 7 January 2020. Retrieved 3 February 2020.
  16. ^ "cavoe's osu! event 2020". Brabanthallen. Archived from the original on 3 February 2020. Retrieved 3 February 2020.
  17. ^ "Performance Ranking". osu.ppy.sh. Archived from the original on 30 November 2018. Retrieved 1 September 2019.
  18. ^ Carpenter, Nicole (16 July 2019). "Gamers with godlike reflexes are racing to break world records in this rhythm game". PC Gamer. Archived from the original on 26 September 2019. Retrieved 12 August 2019.
  19. ^ "osu! PP world record broken by 15-year-old". Dot Esports. 25 July 2019. Archived from the original on 12 August 2019. Retrieved 12 August 2019. For instance, former Overwatch League pro Hyeon "EFFECT" Hwang said he plays the game for one hour before matches to warm up his hands.
  20. ^ Amos, Andrew (16 November 2018). "Circle Work: A chat with Australia's osu! World Cup team". Red Bull. Archived from the original on 30 July 2019. Retrieved 4 September 2019.
  21. ^ "Tournaments". osu.ppy.sh. Archived from the original on 12 December 2017. Retrieved 4 September 2019.
  22. ^ "osu!stream". osu.ppy.sh. Archived from the original on 6 May 2021. Retrieved 9 May 2019.
  23. ^ blog, ppy. "osu!stream 2020 release". blog.ppy.sh. Archived from the original on 27 February 2020. Retrieved 27 February 2020.
  24. ^ GitHub - ppy/osu: rhythm is just a *click* away!, ppy, 6 September 2019, archived from the original on 3 April 2017, retrieved 6 September 2019
  25. ^ a b ppy/osu-framework, ppy, 15 June 2021, archived from the original on 24 June 2021, retrieved 24 June 2021
  26. ^ G, Pascal (11 February 2019), McKay42/McOsu, archived from the original on 24 June 2021, retrieved 24 June 2021
  27. ^ "McOsu on Steam". store.steampowered.com. Archived from the original on 24 June 2021. Retrieved 24 June 2021.
  28. ^ "Test : osu!". jeuxvideo.com (in French). 7 June 2015. Archived from the original on 21 June 2017.
  29. ^ Ball, Daniel (April 27, 2010). "Online rhythm and music game osu! reviewed - MMOGames.com". MMOGames.com. Archived from the original on October 22, 2018. Retrieved October 22, 2018.
  30. ^ Webb, Kevin (24 August 2019). "Professional gamers like Ninja use this music game to practice their aim and improve their mouse skills — Here's how you can play for free". Business Insider. Archived from the original on 2 December 2019. Retrieved 26 August 2019.

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