Play Nightmare Circus emulator game online in the highest quality available. Nightmare Circus is a Sega Genesis game that you can enjoy on Play Emulator. This SEGA game is the US English version that works in all modern web browsers without downloading. Nightmare Circus is part of the Arcade Games and Platform Games you can play here. PlayEmulator has many online retro games available including related games like Teenage Mutant Ninja Turtles 3: Mutant Nightmare, Knightmare, and Nightmare Creatures.