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Sonic the Hedgehog Spinball
Developer	Polygames, Sega Technical Institute (GEN/MD) Sega interActive (GG/SMS)
Publisher	Sega
Released	November 23, 1993 November 1993 December 10, 1993 October 1994 (Game Gear) September 1994 (Game Gear)
Genre	Action, Pinball
Mode(s)	Single-player, multiplayer
Ratings	VRC General Audiences (GA)
Platform(s)	Genesis, Game Gear, Master System, Virtual Console, GameCube
Media	8-megabit Cartridge
Input methods	Control pad

Sonic the Hedgehog Spinball (also known as Sonic Spinball) is an adventure pinball game in the Sonic the Hedgehog series. It was originally released for the Sega Mega Drive/Genesis in 1993 and later ported to the Game Gear system. It was also released in 1994 on the Master System in Europe by Sega Europe (which is one of the last games made for the system and is quite hard to find), this was later released in Brazil by TecToy and in Portugal by Ecofilmes in 1995. This version is a port of the Game Gear version. The Mega Drive/Genesis version was released on the Wii's Virtual Console on March 12, 2007 in North America and April 5, 2007 in Europe. The game is a pun on pinball and Sonic's famous spin move. It is the only Sonic game to feature characters from the Saturday morning cartoon Sonic the Hedgehog, though only in cameos. The game's score was composed by Howard Drossin.

Title screen of Sonic Spinball.

Dr. Robotnik has assumed control of Mt. Mobius and turned it into a mechanical base. Utilizing energy produced by the magma flowing under the volcano, this new monstrosity (the Veg-O-Fortress) has the power to transform helpless animals into robot slaves at an astounding rate. Sonic the Hedgehog and Tails fly onto the scene, but Sonic is knocked off the wings of the airplane by a blast from the fortress. He falls into the water, but is rescued and taken to the subterranean levels of the Veg-O-Fortress. The fortress must be destroyed from the inside-out, and the only way to make that happen is to trigger an eruption in the volcano it's built on. Sonic knows this can be done by removing the Chaos Emeralds that keep the volcano stable. Robotnik, however, is also aware of the fragile relationship that exists between the Emeralds and the mountain, and he's set up an elaborate Pinball Defense System to make sure the precious jewels don't go anywhere.

Sonic Spinball is essentially the logical continuation of a tradition of pinball themed levels that started with Spring Yard Zone on Sonic the Hedgehog. The game features four large pinball 'tables' - a sewer level, a geothermal power station, a robot factory, and a launchpad system. The player must guide Sonic through each of the four levels and collect all of the Chaos Emeralds, then fight Dr. Robotnik.

The main difference between this game and an actual pinball game is the ability to influence the "ball" (Sonic) directly by using the D-pad. The A, B and C buttons operate the flippers and can be assigned in the Options menu. The traditional Sonic the Hedgehog platformer gameplay is kept to a very low minimum.

The Machine Zone

• Toxic Caves (known as Toxic Pools on the 8-bit versions): Sonic is flushed into a cavern full of Stinky Toxic waste and mine carts. There are 3 Chaos Emeralds to collect here that must be obtained by hitting multiple switches. In 8-bit versions, the design for this level has completely changed.

• Lava Powerhouse: Sonic ascends to the next level, a power station of sorts that uses magma and steam energy to run various machines. There are 3 emeralds here.

• The Machine: There are 5 emeralds here in this high-tech level. Sonic can also find a giant-sized animal prison in the very middle of this zone.

• Showdown: Sonic has to find 5 Chaos Emeralds and reach the top of the Launch site to defeat Dr. Robotnik before he manages to escape.

At the end of each of the first three stages, Sonic gets to play a bonus round. These bonus rounds are set up like real pinball machines, with Sonic at the controls. The player is given a task to complete and three balls to play with. Flipper controls are the same as in the normal game, but the ball cannot be controlled with the D-pad like Sonic. Pressing all the flipper buttons at once will make Sonic shake the machine, though repeated shakes will cause a tilt and lock the flippers.

Completing the bonus stages are optional and serves only to increase the player's score. The three bonus rounds, in corresponding order to the normal zones, are:

• Trapped Alive: The object is to destroy all the robot machines and free the helpless animals trapped inside them and then destroy Robotnik. Among the prisoners are Sonic's Freedom Fighter pals from the SatAM cartoon: Miles "Tails" Prower, Bunnie Rabbot, Sally Acorn, and Rotor Walrus.
• Robo Smile: A grinning Robotnik face moves across the machine. The objective is to knock out all of Robotnik's teeth.
• The March: Similar to Trapped Alive, the object is to destroy the capsule and free the animals and Freedom Fighters within. The capsule is circled by a ring of Scratch robots.

Additionally, a hidden multi-ball bonus game, called The Clucker's Defense, can be played on any stage, but only if the player manages to collect every ring in the zone. Several star circles will appear in the stage, hidden at various points on the board. By leaping into them Sonic will be warped to this bonus round. The object is to destroy a crab Badnik who is protected by a pair of Cluckers.

• Sonic the Hedgehog Spinball at MobyGames
• Sonic Spinball page at The GHZ