While precious few games were released in Nintendo's Osu! Tatakae! Ouendan series (including the localized sequel Elite Beat Agents), fans have taken it upon themselves to recreate the franchise's energetic rhythm gameplay in osu!, a free-to-play simulator for PCs. An iOS version, osu!stream, was released as a free download in the App Store this week.

As in the Ouendan games, Osu challenges players to tap, slide, and spin a series of markers to the beat of a background music track. The mechanics translate well to iOS devices, and while only two songs are included with the core application, additional tracks (including a selection of Touhou remixes) are available as in-app purchases.