Sky theme

Stages with a sky theme typically have clouds, large drops, and, sometimes, the Tornado. These stages take place high in sky, sometimes on a flying fortress built by Dr. Eggman.

The first appearance of a sky-themed level was in Sky Base Zone from Sonic the Hedgehog (8-bit), the last zone of the game.

Stages with a sky theme

 * Sky Base Zone, Sonic the Hedgehog (8-bit) (1991)
 * Sky Chase Zone, Sonic the Hedgehog 2 (1992)
 * Wing Fortress Zone, Sonic the Hedgehog 2 (1992)
 * Sky High Zone, Sonic the Hedgehog 2 (8-bit) (1992)
 * Sleeping Egg Zone, Sonic Chaos (1993) - This stage also incoporates elements of the industrial theme.
 * Launch Base, Sonic the Hedgehog 3 (1994)
 * Sky Sanctuary, Sonic & Knuckles (1994)
 * Sky Chase, Sonic Adventure (1999)
 * Sky Deck, Sonic Adventure (1999)
 * Labyrinth of the Sky, Sonic Labyrinth (1995)
 * MetalIsland Area, Tails' Skypatrol (1995)
 * Sky Chase Zone, Sonic Pocket Adventure (1999)
 * Aerobase Zone, Sonic Pocket Adventure (1999)
 * Angel Island Zone,Sonic Advance (2001) - This stage also incorporates elements of the ancient ruins theme.
 * Egg Rocket Zone, Sonic Advance (2001) - This theme predominates during the first two sections of the zone as the final section takes place in outer space; therefore it has a space theme.
 * Sky Rail, Sonic Adventure 2 (2001)
 * Sky Canyon, Sonic Advance 2 (2002)
 * Egg Fleet, Sonic Heroes (2003)
 * Chaos Angel, Sonic Advance 3 (2004)
 * Altar Emerald, Sonic Advance 3 (2004)
 * Glyphic Canyon, Shadow the Hedgehog (2005) - This stage incorporates elements of the ancient ruins theme.
 * Sky Troops, Shadow the Hedgehog (2005)
 * Air Fleet, Shadow the Hedgehog (2005)
 * Altitude Limit, Sonic Rush (2005)
 * Unknown, Sonic Rush (2005) - This stage incorporates elements of the space theme.
 * Blue Sky Zone, Sonic Jump (2005)
 * Babylon Garden, Sonic Riders (2006)
 * Sky Road, Sonic Riders (2006)
 * Sky Park, Sonic Rivals (2006)
 * Sky Babylon, Sonic Rush Adventure (2007) - This stage incorporates elements of the ancient ruins theme.
 * Levitated Ruin, Sonic and the Secret Rings (2007)
 * Tornado Defense, Sonic Unleashed (2008)
 * Sweet Mountain, Sonic Colors (2010)
 * Sky Sanctuary, Sonic Generations (2011)
 * Sky Fortress Zone, Sonic the Hedgehog 4: Episode II, (2012)
 * Blue Sky Zone, Sonic Jump (2012) (2012)
 * Windy Hill, Sonic Lost World (2013) - This stage mainly incorporates elements of the Green Hill theme.
 * Sky Road, Sonic Lost World (2013)
 * Sky Citadel, Sonic Boom: Rise of Lyric (2014) - This level also incorporates elements of the ancient ruins theme.