
Enhanced version of Sonic Adventure including, unlockable, the Game Gear games Sonic the Hedgehog, Sonic Drift, Sonic Chaos, Sonic the Hedgehog Spinball, Sonic Labyrinth, Sonic the Hedgehog 2, Dr.
Sonic Adventure DX: Director's Cut (June 18, 2003), GameCube, Windows. Sonic Adventure (November 27, 1998), DreamCast. Re-released in 1997 for PC and in 2007 for Wii Virtual Console. Sonic 3D Blast (November 1996), Sega Mega Drive/Genesis, Sega Saturn. Re-released in 1997 for Sega Master System and in 2012 for 3DS Virtual Console. Sonic Blast (November 1996), Game Gear. Using any other Mega Drive/Genesis game accesses a mini-game version of Blue Sphere. Obtained by using Sonic the Hedgehog or Sonic Compilation. Knuckles the Echidna in Sonic the Hedgehog 2. The game also utilizes "lock-on technology", that lets the player combine the game with other games by putting them on top of it.
Re-released in 2009 for Wii Virtual Console and Xbox Live Arcade.
Sonic & Knuckles (October 17, 1994), Sega Mega Drive/Genesis. Re-released in 2012 for 3DS Virtual Console. Sonic the Hedgehog: Triple Trouble (October 15, 1994), Game Gear. Re-released in 2007 for Wii Virtual Console and in 2009 for Xbox Live Arcade.
Sonic the Hedgehog 3 (January 23, 1994), Sega Mega Drive/Genesis. Re-released in 2009 for Wii Virtual Console. Sonic Chaos (October 25, 1993), Sega Master System, Game Gear. Re-released in 1996 for PC and in 2011 for PSN and Xbox Live Arcade. Sonic the Hedgehog CD (September 23, 1993), Sega CD. A remastered version was also released in 2013 for iOS and Android. Re-released in 2006 for mobile phone, in 2007 for Wii Virtual Console and Xbox Live Arcade, in 2011 for PSN and PC, in 2015 for Nintendo 3DS in the 3D Classics series, in 2020 for Nintendo Switch in the Sega Ages series, and in 2021 for Nintendo Switch Online. Sonic the Hedgehog 2 (November 21, 1992), Sega Mega Drive/Genesis. Re-released in 2008 for Wii Virtual Console and in 2012 for Nintendo 3DS Virtual Console. Sonic the Hedgehog 2 (October 16, 1992), Sega Master System, Game Gear. Re-released in 2008 for Wii Virtual Console and in 2013 for 3DS Virtual Console. Sonic the Hedgehog (October 25, 1991), Sega Master System, Game Gear. Re-released in 2005 for mobile phone, in 2006 for Wii Virtual Console and for Game Boy Advance as Sonic the Hedgehog Genesis, in 2007 for PSN, Xbox Live Arcade, and iPod, in 2009 for iOS, in 2010 for PC, in 2013 for Nintendo 3DS in the 3D Classics series, and in 2018 for Nintendo Switch in the Sega Ages series. Sonic the Hedgehog (June 23, 1991), Sega Mega Drive/Genesis. The list only includes games that are titled "Sonic", with other titles such as Knuckles' Chaotix or Shadow the Hedgehog being considered part of their own series.