StepMania is a rhythm video game for Microsoft Windows, Mac OS, and Linux created by Chris Danford.
It was originally developed as a simulator of Konami's popular arcade game series Dance Dance Revolution, and has since evolved into an extensible rhythm game engine capable of supporting a wide variety of rhythm-based game types. Released under the MIT License, StepMania is free software.
Video games In The Groove, and Pump It Up Pro use StepMania as its game engine. StepMania was included in a video game exhibition at New York's Museum of the Moving Image in 2005.
StepMania 4.0 is currently in development and in beta version and certain functionalities might not be working properly, including themes that were built on StepMania 3.9.
an extended description!