ISO Image of the game Dance Dance Revolution (version BLUS30433) for the PS3. To be played on Cobra CFWs (you don't need a dongle to use those anymore).

For non-cobra CFWs it is possible to convert the file to a game folder with the following tool and play it: https://www.psx-place.com/forum/cfw-tools/ps3-iso-tools-rudi-rastelli-403.html