There is a legitimate rhythm game titled (developed by La Moutarde and released on platforms like Steam and Nintendo Switch). However, the "File: Old.School.Musical.zip" prompt specifically refers to the fictional horror story meant to unsettle readers by using the name of a familiar-sounding game.
While versions of internet urban legends can vary, the core narrative usually includes: File: Old.School.Musical.zip ...
If you are looking for the , let me know: There is a legitimate rhythm game titled (developed
: The narrator finds a zip file on an old hard drive, a shady forum, or a "dark web" link. It claims to be an unreleased or "beta" version of a rhythm game. a shady forum
Did you see this on a specific (like Reddit/r/nosleep)? Are you trying to write a story based on this title?