Rocksmith+ - Rocksmith builds off of the fundamentals of music games like Rock Band and Guitar Hero by offering fundamental lessons in actually playing guitar.
Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.
StepMania - Rhythm game for Windows, Mac, and Linux.
World in Audition - World in Audition is an Addictive, Dancing and Music Simulation.
Deemo - Deemo comes with a Music-based Rhythm video game that features only Single-player mode and is available to play on Multiple Platforms.
Frets on Fire - Bonus content.