Osu! Tatakae! Ouendan is a Nintendo DS game based on using simple gestures to match the rhythms of popular Japanese songs. This game has been adapted for the PC, and on the osu! website, players can create profiles, gain levels, share beatmaps, etc. The osu! API allows developers to retrieve general beatmap information, general user information, information on the top 50 scores of a given beatmap, and information on multiplayer matches.