Final Zone

Final Zone is the last level from the original Sonic the Hedgehog. It includes the final fight with Dr. Robotnik inside his private laboratory. Sonic must defeat Robotnik without being hit for there are no rings to assist. Robotnik will attack using what are essentially four engine pistons that can crush Sonic. Every time two out of four pistons come down; one decoy, and one with Robotnik in it. Sonic is supposed to attack the pistons with Robotnik in them a total of 8 times. Between each piston cycle, four spark balls come from the ceiling towards Sonic, who must dodge them. After clearing this level, Robotnik flees, during which Sonic hits him while he is fleeing one last time, and after which the player is treated to the end sequence and credits.

The ending differs if the player has collected all of the Chaos Emeralds or not.

Music
thumb|left|300px|Final Zone

Trivia

 * This zone has 2 possible endings. The first ending is when Dr. Robotnik flees, you may hit him, destroying him once and for all. The second ending is when the Doctor flees, you may let him escape. No matter which is chosen, the ending continues as normal.
 * Once Eggman has tried to flee, Sonic can kill himself at the end by jumping off at the edge.