Which Switch is Which?

Which Switch is Which? is a Challenge Act in the console/PC versions of Sonic Generations.

Description
Played as Classic Sonic, this level takes place in the Chemical Plant. The player's objective is to simply make it through the given terrain to the Goal Ring. However, several barriers block the players progress. In order to gradually get rid of these hinderences, the player has to find the switch corresponding to the given barrier in order to get rid of it so that they move forward. This is done with every barrier encountered until the player makes it to the Goal Ring.