Sonic Labyrinth (ソニックラビリンス, Sonikkurabirinsu) is a puzzle-come-platform game for the Sega Game Gear, released on 17 November, 1995 in Japan and in 1995 in North America and Europe. It is also playable on Sonic Adventure DX and on the PC, PlayStation 2 and Xbox editions of Sonic Mega Collection Plus. The game features isometric 3D gameplay similar to that of the SegaSonic the Hedgehog arcade game and Sonic 3D. Sonic, Dr. Eggman and Badniks are the only characters present in the game.

Players control Sonic by maneuvering him around a pinball-like arena, using his ability to roll into a ball to defeat Badniks and pick up keys in order to exit through the GOAL door to clear each stage. The only move Sonic can use in the game is the Spin Dash, as Dr. Eggman has secretly replaced his famous red shoes with another pair: the Slow-Down Boots, which have taken away Sonic's abilities to run fast and jump. They cannot be removed at all without the use of Chaos Emerald energy. Although Sonic retains his walking and Spin Dash abilities, there is a time limit in each stage, so one must move quickly to complete stages before the timer runs out.

Stages

In Sonic Labyrinth, there are a total of four Zones, each containing three acts and a boss battle. The goal in each stage is to help Sonic collect the three hidden keys and then head to the GOAL door.

Throughout the stages are many enemies waiting to attack Sonic, so the player must remain aware of their surroundings. Sonic is only able to collect rings during Boss fights (and before each of these fights as he rolls down a steep incline toward the Boss) but Sonic will "die" if hit twice regardless of how many rings he possesses. If Sonic is not holding any rings, he will only take one hit. Whilst holding the keys, Sonic can withstand a few enemy attacks.