Play Sonic and Knuckles – Reversed Frequencies Online

Sonic and Knuckles – Reversed Frequencies is a Sega Genesis (Mega Drive) hack from 0, a modification of the original Sonic and Knuckles cartridge. It reworks the physics and level geometry to invert the player's sense of direction and control, turning familiar stages into disorienting new challenges.

You control Sonic or Knuckles through classic zones, but gravity has been flipped; you run on ceilings, stick to the undersides of platforms, and navigate loops that now bend in reverse. The main objective remains to reach the goal, but every jump and spin dash requires recalibrated timing. Signature mechanics include clinging to surfaces from below and navigating enemy placements that exploit the altered perspective. The pacing is deliberate, demanding careful observation, and the difficulty spikes sharply in sections designed for standard gravity. It feels like learning to walk in a world that's been turned upside down.