Industrial theme

A stage with an industrial theme usually features a factory setting. Most of these factory settings are in one of Eggman's factories. In some cases, the factory has dangerous elements, such as lava. Most of the time, an industrial setting comes hand-in-hand with standard enemies.

Stages with an industrial theme

 * Scrap Brain Zone, Sonic the Hedgehog (1991) - This is the first example of the industrial theme, and incorporates many elements common to later industrial themed levels such as spinning blades, conveyor belts, and moving pistons. Act three of this zone copies from Labyrinth Zone and contains underwater and ancient ruins themes.
 * Gimmick Mountain Zone, Sonic the Hedgehog 2 (8-bit) (1992)
 * Scrambled Egg Zone, Sonic the Hedgehog 2 (8-bit)'' (1992)
 * Crystal Egg Zone, Sonic the Hedgehog 2 (8-bit)'' (1992)
 * Chemical Plant Zone, Sonic the Hedgehog 2 (1992) - This zone also incorporates underwater elements in the form of Mega Mack.
 * Oil Ocean Zone, Sonic the Hedgehog 2 (1992)
 * Metropolis Zone, Sonic the Hedgehog 2 (1992)
 * Quartz Quadrant, Sonic CD (1993)
 * Wacky Workbench, Sonic CD (1993)
 * Metallic Madness, Sonic CD (1993)
 * 'Electric Egg Zone, Sonic Chaos'' (1993)
 * Launch Base Zone, Sonic the Hedgehog 3 (1994) - This zone also incorporates minor underwater elements, which are featured heavily in Knuckles' version of this stage in Sonic 3 & Knuckles.
 * Sunset Park Zone, Sonic Triple Trouble (1994)
 * Tidal Plant Zone, Sonic Triple Trouble (1994) - This zone in primarily uses the underwater theme, but is set in an industrial enviroment.
 * Atomic Destroyer Zone, Sonic Triple Trouble (1994)
 * Gene Gadget Zone, Sonic 3D (1996)
 * Panic Puppet Zone, Sonic 3D (1996)
 * Hot Shelter, Sonic Adventure (1998)
 * Final Egg, Sonic Adventure (1998)
 * Secret Plant, Sonic Pocket Adventure (1999)
 * Secret Base Zone, Sonic Advance (2001)
 * Hot Crater, Sonic Advance 2 (2002) - This zone also contains elements of the fire theme.
 * Rail Canyon, Sonic Heroes (2003)
 * Bullet Station, Sonic Heroes (2003)
 * Ocean Base, Sonic Advance 3 (2004) - This zone also incorporates elements of the underwater theme.
 * Iron Jungle, ''Shadow the Hedgehog (2005)
 * GUN Fortress, ''Shadow the Hedgehog (2005)
 * Lava Shelter, ''Shadow the Hedgehog (2005) - This zone also incorporates element of the fire theme.
 * Egg Factory, Sonic Riders (2006)
 * Ice Factory, Sonic Riders (2006)
 * White Acropolis, ''Sonic the Hedgehog (2006) -This zone also incorporates elements of the winter theme.
 * Radical Train, ''Sonic the Hedgehog (2006)
 * Aquatic Base, ''Sonic the Hedgehog (2006)
 * Death Yard, Sonic Rivals (2006)
 * Machine Labyrinth, Sonic Rush Adventure (2007)
 * MeteoTech Premises, Sonic Riders: Zero Gravity (2008)
 * MeteoTech Sparkworks, Sonic Riders: Zero Gravity (2008)
 * Planet Wisp, Sonic Colors (2010) - Planet Wisp was under construction; therefore, it could be considered an industrial setting.