Sonic 1 - 50Hz = 60Hz (240p Edition)

This is a ROM hack of the original Sonic the Hedgehog for the Sega Genesis, specifically designed to address the speed issues of the PAL 50Hz version. The hack converts the game to run at 60Hz output while also enabling a 240p resolution, making it play at the intended speed and look crisper on compatible displays. It was created by a member of the Sonic hacking community, likely for the Sonic Hacking Contest or similar event, so there is no official release date or publisher to point to.

The gameplay is identical to Sonic the Hedgehog: you control Sonic through six zones, each with three acts. You run from left to right, collecting rings, avoiding spikes, and defeating Dr. Robotnik's badniks by jumping on them or using a spin dash. At the end of each act you hit a goalpost; at the end of the third act you face a boss fight against Robotnik in one of his machines. The core loop is fast platforming with multiple routes and hidden bonus stages triggered by passing checkpoints with at least 50 rings.

This hack is worth trying if you are a fan of the original but grew frustrated with PAL versions that ran slower. It provides the proper 60Hz speed without the need for a Japanese or NTSC cartridge, and the 240p output can improve image quality on modern displays via upscalers. It is a niche modification rather than a full reimagining, so it appeals most to players who want the classic Sonic experience with technical fixes.