Clone Hero - Clone Hero is a free rhythm game, which can be played with any 5 or 6 button guitar controller...
Hotaru no Nikki - Hotaru no Nikki is an Adventure-based, Puzzle-Platform, and Single-player video developed by Nippon Ichi Games.
Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.
Timespinner - Timespinner is a Platform, Single-player, and Multiplayer Metroidvania video game developed by Lunar Ray Games for Multiple Platforms.
StepMania - Rhythm game for Windows, Mac, and Linux.
Four Sided Fantasy - Four Sided Fantasy is an Adventure-based, Side-Scrolling, Puzzle-Platform, and Single-player video game developed by Ludo Land and published by Serenity Forge.