osu! is a rhythm game primarily developed, published and created by Dean Herbert. Originally released for Microsoft Windows on September 16, 2007, the game has also been ported to macOS, Linux, Android and iOS. Its gameplay is based on titles including Osu! Tatakae! Ouendan, Taiko no Tatsujin, Beatmania IIDX, Elite Beat Agents, O2Jam, StepMania, and DJMax. The game has an active esports community, and is also sometimes recommended by professional players of other games to practice or warm up.