So in rhythm games, chart reuse and "piracy" is... a surprisingly big issue that is related to copyright. This warrants a bit more explanation

For example, the IP of Dance Dance Revolution/DDR is owned solely by Bemani and Konami; both are Japanese companies which are not known for being generous with copyright, mind you. The DDR series produces lots of original music which are owned by the IP holders, and just about every chart (the thing you actually play) created for each piece of music in the game is also technically copyright protected

Problem is, DDR got wayyy too popular so there are a lot of clones out there; in fact most arcades in the US would have a "DDR" cabinet when it is actually a clone. Usually something like Stepmania (which is FOSS btw). Would it be considered piracy if someone else uses the official chart even though they are not running one of the officially licensed DDR cabs?

I don't know the details as to how it ended up like this, but it seems like a lot of games strictly ban such "piracy", whereas DDR is a bit of an outlier. Case in point, Beatmania series (one of the oldest rhythm game series) treats such acts as piracy, and the simulation community is onboard with this so all of the ripped official charts would be referred to as "illegal BMS"... but this is compensated by having a massive collection of community charts that have no affiliation with the IP holders of Beatmania whatsoever. DDR... seems to allow all of their charts to be released as simfiles, case in point.

There's also the funny case for Sound Voltex (SDVX). This game was also created by Konami, with lots of official songs/charts and a dedicated simulation community. Problem is that SDVX released a PC version of the game (don't buy their official controllers they are ass), and all of the official charts were reuploaded and became available to anyone playing the simulators. These charts are in a very weird legal limbo as far as I'm aware... but everyone knows that simulator users play the official charts