.CRS File Extension
What is a CRS file?
Dance course file used by StepMania, a free rhythmic dancing game; contains information for a dance course challenge, including the challenge type, meter, and song selections; used for saving course preferences.
StepMania courses can be edited by selecting the "Edit Courses" option from the main game menu. StepMania includes several preinstalled CRS files, which are located in the /Courses/Samples/ directory of the software installation.