Sonic CD is an Action, Adventure, and Platformer game for PC published by Sega in 1993. A small planet appears in the skies above Never Lake!
Sonic CD PC Game 1993 Overview:
The key element of this game is the fact that the player can travel to 4 different versions of each level, in 3 different periods. This is achieved thanks to some poles that are scattered throughout the level, with signs of past and future.