Cursed Sonic 3 and Knuckles is a ROM hack of Sonic the Hedgehog 3 & Knuckles for the Sega Genesis. It's infamous for its incredibly difficult gameplay and its intentionally frustrating level design, featuring a cursed version of Sonic with altered sprites and abilities. The game was created by an unknown individual, and its history is largely undocumented outside of online ROM hacking communities. The gameplay consists of traversing the altered levels of Sonic 3 & Knuckles, facing off against redesigned bosses and encountering entirely new challenges in familiar settings. This ROM hack is not officially produced by Sega or any related company; rather, it exists as a fan-made modification.

Cursed Sonic 3 and Knuckles

Crying - Aseimei Sensou (Japan)