Like most of the other Classic Sonic games, Knuckles' Chaotix features multiple endings. While the "bad endings" of other 90s Sonic games tend to simply run off of implication (such as having Dr. Eggman taunt the player while in possession of a given game's powerful MacGuffin), the bad ending of Knuckles' Chaotix opts to directly show the consequences for the player's failure to collect the Chaos Rings, and shows Metal Sonic Kai demolishing a city into flames on-screen.