Knuckles' Chaotix, originally released on the Sega 32X, was a game concept that found its way into the prototype stage for a potential Nintendo 64 version. This prototype reveals an early attempt at translating the unique gameplay of Knuckles' Chaotix onto the 3D capabilities of the N64. While never officially released, it showcases an interesting intersection of game development and franchise adaptation.

Knuckles 64 Prototype

Knife Edge - Nose Gunner (USA)