Several computer games have been produced using clay animation, including "The Neverhood", "Clay Fighter", "Platypus", Clay Moon (iPhone app), and "Primal Rage". Probably the most spectacular use of model animation for a computer game was for the Virgin Interactive Entertainment Mythos game "Magic and Mayhem" (1998), for which stop-motion animator and special-effects expert Alan Friswell constructed over 25 monsters and mythological characters utilising both modelling clay and latex rubber, over wire and ball-and-socket skeletons, much like the designs of Willis O'Brien and Ray Harryhausen.