Nightmare Circus game is a ROM you can play online within your browser. This Sega Genesis ROM runs in our top-notch quality emulator at PlayRoms.net only. Play Nightmare Circus SEGA game online in English USA version on your desktop, tablet, and mobile. If you liked playing this emulator then you will also be interested in similar classic titles Kirby: Nightmare in Dreamland and A Nightmare on Elm Street. This free game belongs to the Platform and Arcade category of online retro games.