is an action-puzzle game developed by Minato Giken and published by Sega for the Game Gear in 1995. The game features Sonic the Hedgehog exploring maze-like stages from an isometric perspective. Dr. Robotnik has robbed Sonic of his trademark speed, so Sonic walks slowly but can roll into a ball and dash across the stages. Upon release, critical reception to the game was mixed; many critics found the game a unique addition to the Sonic library but flawed by convoluted controls and repetitive gameplay. In retrospect, however, it has received generally negative reviews and is considered among the worst Sonic games ever released. Despite this, the game has been re-released multiple times in the following years. Gameplay Sonic Labyrinth is an action and puzzle game with pinball elements. It is presented in an isometric perspective, and has been compared to Marble Madness. Series villain Dr. Robotnik has tricked Sonic the Hedgehog into wearing special shoes designed to rob him of his speed, so Sonic must collect the Chaos Emeralds to release the shoes from his feet. The player controls Sonic, navigating him through maze-like stages filled with enemies and obstacles that hinder his path. Sonic walks uncharacteristically slowly, but can roll into a ball and dash across the levels to take out enemies and avoid danger. This spin dash move can be charged for extra speed and damage. Sonic must collect three keys in each stage and bring them to the goal to advance to the next level. Sometimes the keys may be hidden within enemies. The game has four zones, each containing three stages. After each set of three stages, there is a bonus round of collecting rings and a boss battle. Collecting 100 rings in the bonus round will net the player an extra life. A time attack mode is also available. Development and release Sonic Labyrinth was developed by Minato Giken, and published by Sega. It was released in Japan on 17 November 1995, in North America that November, and in Europe around October or November. The game was included in Sonic Adventure DX (2003) as an unlockable bonus, and in the compilation Sonic Mega Collection Plus (2004). It was rereleased for the Nintendo 3DS on the Japanese eShop digital distribution platform on 16 May 2012. It was later released in Europe on 5 October 2012, and in North America on 17 June 2013. The North American