The unofficial osu! Luxembourg site!
What is osu? (copied from wikipedia)
osu! is a free and open-source rhythm game developed and published by Australian-based company PPY Developments PTY, created by Dean Herbert (also known as peppy). Originally released for Microsoft Windows on September 16, 2007, the game has also been ported to macOS (this version might be unstable), and Windows Phone. Its gameplay is based on titles including Osu! Tatakae! Ouendan, Elite Beat Agents, Taiko no Tatsujin, Beatmania IIDX, O2Jam, and DJMax.
There are four official gamemodes: osu!, osu!Mania, osu!Catch, and osu!Taiko. In the main game mode of osu!, other gameplay modes and mods add additional gameplay features or change the difficulty.
The primary emphasis of gameplay is to adapt and react to stimuli in the form of clicking or tapping on hit circles, which requires good Eye–hand coordination. These hit circles have other forms, such as sliders and spinners which are interacted with in similar ways. These different gameplay mechanics are part of a beatmap. Beatmaps are a combination of a song, button layout as well as themes or cosmetic skins to make each beatmap unique. These are typically created by other users and typically feature varying difficulties.
osu! also includes a ranking system for users to compete against one another, this creates a competitive environment where people compete to have their rankings displayed on the official leaderboards. Players can also play casually with friends or other users in a friendly competition, where all players play the same beatmap at the same time. As of 2018, there have been 8 osu! World Cups, which are 4v4 tournaments between players from countries around the world. The victors win prizes such as cash, special benefits, and osu! supporter, which is a subscription based service that provides special benefits for the player.
Jeuxvideo.com reviewed osu! favorably with 18/20 points in 2015. 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.