I found Atari ST games today, which brought back a 1980s nostalgia for me:
Vegas Gambler (1987)
Goldrunner II (1988)
Goldrunner II Scemergy Disk (1988)
So what does this have to do with Commodore? Psyclapse was the the name of a Commodore 64 game that was never released. The games was released on Atari ST, the goal being to escape from the castle where an evil villain had time warped warriors from the past.