Industrial theme

A stage with an industrial theme usually features a factory setting. Most of these factory settings are in one of Doctor Eggman's bases. In some cases, the factory has dangerous elements, such as lava or molten metal. 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 3 of this zone copies from Labyrinth Zone and contains both an underwater theme and an ancient ruins theme.
 * 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)
 * Palmtree Panic, Sonic the Hedgehog CD (1993) - Mainly predominates in either future timelines; the round mainly incorporates elements of the Green Hill theme
 * Tidal Tempest, Sonic the Hedgehog CD (1993) -  Although this round mainly incorporates underwater elements, industrial elements predominate in either future timeline but the bad future timeline retains its ancient ruins elements from the round's earlier timelines (past and present).
 * Quartz Quadrant, Sonic the Hedgehog CD (1993) - This theme predominate in all timelines (save for the past, for which industrial elements are minimal) except for the good future.
 * Wacky Workbench, Sonic the Hedgehog CD (1993)
 * Metallic Madness, Sonic the Hedgehog CD (1993)
 * Electric Egg Zone, Sonic Chaos (1993)
 * Mecha Green Hill Zone, Sonic Chaos (1993) - This stage also incorporates elements of the Green Hill theme.
 * Sleeping Egg Zone, Sonic Chaos (1993) - This stage also incoporates elements of the sky theme.
 * Trap Tower, SegaSonic the Hedgehog (1993)
 * Landslide Limbo, SegaSonic the Hedgehog (1993)
 * Eggman's Tower, SegaSonic the Hedgehog (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.
 * Chrome Gadget Zone, Sonic the Hedgehog 3 (1994)
 * Sunset Park Zone, Sonic Triple Trouble (1994)
 * Tidal Plant Zone, Sonic Triple Trouble (1994) - This zone primarily incorporates elements of the underwater theme, but it is set in an industrial environment.
 * Atomic Destroyer Zone, Sonic Triple Trouble (1994)
 * Labyrinth of the Factory, Sonic Labyrinth (1995)
 * Battle Fortress, Tails Adventure (1995)
 * DarkCastle Area, Tails' Skypatrol (1995)
 * Gene Gadget Zone, Sonic 3D (1996)
 * Panic Puppet Zone, Sonic 3D (1996)
 * Dynamite Plant, Sonic the Fighters (1996)
 * Silver Castle Zone, Sonic Blast (1996)
 * Reactive Factory, Sonic R (1997)
 * Hot Shelter, Sonic Adventure (1998)
 * Final Egg, Sonic Adventure (1998)
 * Secret Plant, Sonic Pocket Adventure (1999)
 * Gigantic Angel Zone, Sonic Pocket Adventure (1999)
 * Secret Base Zone, Sonic Advance (2001) - This zone also incorporates elements of the fire theme.
 * Egg Rocket Zone, Sonic Advance (2001) - This stage also incorporates elements of the sky theme (Act 2) and space theme (Act 3).
 * Hot Crater, Sonic Advance 2 (2002) - This stage also incorporates elements of the fire theme.
 * Techno Base, Sonic Advance 2 (2002)
 * Lost Colony, Sonic Adventure 2 (2001)
 * Eternal Engine, Sonic Adventure 2 (2001)
 * Cosmic Wall, Sonic Adventure 2 (2001)
 * Crazy Gadget, Sonic Adventure 2 (2001)
 * Cannon's Core, Sonic Adventure 2 (2001) - This stage also incorporates elements of the ancient ruins theme (throughout Knuckles, Rouge and Sonic's sections).
 * Grand Metropolis, Sonic Heroes (2003)
 * Power Plant, Sonic Heroes (2003)
 * 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 elements of the fire theme.
 * Egg Factory, Sonic Riders (2006) - This zone also contains elements of the fire theme.
 * Ice Factory, Sonic Riders (2006) - This zone also incorporates elements of the winter theme.
 * 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 Zone, Sonic Rivals (2006)
 * Machine Labyrinth, Sonic Rush Adventure (2007)
 * MeteoTech Premises, Sonic Riders: Zero Gravity (2008)
 * MeteoTech Sparkworks, Sonic Riders: Zero Gravity (2008)
 * Knight's Passage, Sonic and the Black Knight (2009)
 * Mad Gear Zone, Sonic the Hedgehog 4: Episode I (2010)
 * Planet Wisp, Sonic Colors (2010) - Planet Wisp was under construction; therefore, it can be considered an industrial setting.
 * Asteroid Coaster, Sonic Colors (2010) - This stage also incorporates elements of the space theme.
 * Planet Wisp, Sonic Generations (2011)
 * Oil Desert Zone, Sonic the Hedgehog 4: Episode II (2012) - This stage also incorporates elements of the desert theme.
 * Frozen Factory, Sonic Lost World (2013)