Sonic 2 Special Stage Editor
I heard a program on Sonic Retro, that let´s you edit the special stages in Sonic the Hedgehog 2 (1992).
The program allows you to do:
- Object placement (rings, bombs)
- The half-pipe’s twists and turns (within Sonic 2 engine constraints)
- Special stage length
- The number of special stages
However, you can´t change the background for the special stages, or if not, it wouldn´t be how it looks like originally when SEGA made the special stages back in 1992.