GURPS Supers Deathwish (1989)

"Are You Ready To Rock?"

From the back cover:

"There's no business like show business, and Deathwish knows how to put on a show! They've got strobe lights, laser effects, smoke machines and enough wattage to deafen even the most hardcore rockers. But strange things are starting to happen at Deathwish shows – a shooting here, a stabbing there, and the occasional full-blown riot to make things interesting. Add to this mixture a sinister group of meta-villains whose tastes run more to museum robberies than to guitars and drums, and you've got a mystery on your hands!"

An adventure for three or more 500-point supers.