Gene Simmons - electric and acoustic guitars, vocals, co-producer
Neil Jason - bass guitar
Elliot Randall - guitar
Allan Schwartzberg - drums
Sean Delaney - percussion, co-producer
Ron Frangipane - symphonic arrangements and conductor of Members of the New York and Los Angeles Philharmonic Orchestras
Gordon Grody, Diva Gray, Kate Sagal, Franny Eisenberg, Carolyn Ray, Sean Delaney - Backing vocals
Eric Troyer - piano and vocals on "Radioactive" & "Living in Sin"
Steve Lacey - guitar on "Radioactive"
John Shane Howell -
classical guitar, segue between "Radioactive" & "Burning Up With Fever"
Richard Gerstein - piano on "True Confessions" & "Always Near You/Nowhere to Hide"
Joe Perry - Guitar on "Radioactive" & "Tunnel of Love"
Bob Seger - backing vocals on "Radioactive" & "Living in Sin"
Rick Nielsen - guitar on "See You In Your Dreams"
Helen Reddy - Background vocals on "True Confessions"
Jeff "Skunk" Baxter - guitar on "Burning Up With Fever", "See You Tonite", "Tunnel of Love" & "Mr. Make Believe"
Donna Summer - Background vocals on "Burning Up With Fever"
Janis Ian - backing vocals on the "Prelude to Radioactive"
Cher - spoken word phone call on "Living In Sin"
Mitch Weissman & Joe Pecorino (Beatlemania) - backing vocals on "Mr. Make Believe", "See You Tonite" & "Always Near You/Nowhere to Hide"
Michael Des Barres - Background vocals on "See You in Your Dreams"
Ritchie Ranno - Guitar on "Tunnel of Love"
The Citrus College Singers - "True Confessions" & "Always Near You/Nowhere to Hide"