Fiendish Freddy’s Big Top O’Fun is a video game developed by Gray Matter under developer Chris Gray and published in 1990 by Mindscape. It originally appeared on the 16-bit Atari ST, IBM PC and Commodore Amiga, before later being converted to the ZX Spectrum, Commodore 64, Amstrad CPC. The Commodore 64 version was included on the bundled cartridge of the ill-fated Commodore 64 Games System.