| Knuckles in Sonic 1 | Stealth | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP | Complete | 1.1 | 12 Sep 2005 |
| Sonic 1 Spindash | Esrael | Sonic the Hedgehog | Action > Platformer | GEN | GP | Improvement | 1.0 | 28 Jan 2004 |
| Sonic 1 Color Contrast | TheInvisibleSun | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP, O | Complete | 4.3 | 22 Dec 2013 |
| NEW Sonic The Hedgehog | kchrules | Sonic the Hedgehog | Action > Platformer | GEN | S, L, GP | Improvement | 1.0 | 08 Jan 2008 |
| Tails in Sonic 1 | drx | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | 2.1.1 | 10 Oct 2008 |
| Sonic1 Spike Bug Fix & Spindash | Mariofan0 | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | 1.0 | 23 Feb 2008 |
| Metal Sonic Hyperdrive (2011) | Lone Devil | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP, O | Complete | 4.0 Final | 31 Oct 2011 |
| Sonic 1 Improvement | Penta Penguin | Sonic the Hedgehog | Action > Platformer | SMS | T, GP | Improvement | 1.31 | 15 Aug 2020 |
| Super Sonic in Sonic the Hedgehog | Puto | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | beta 4 | 22 Jun 2007 |
| Charmy Bee in Sonic the Hedgehog | E-122-Psi | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | Rev 1.1 | 25 Nov 2011 |
| Amy Rose in Sonic the Hedgehog | E-122-Psi | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | 2.1 | 01 Apr 2015 |
| Shadow the Hedgehog in Sonic the Hedgehog | FeliciaVal | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | 1.1 | 14 Feb 2011 |
| Sally Acorn in Sonic the Hedgehog | E-122-Psi | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | 2.2 | 19 Oct 2015 |
| Vector the Crocodile in Sonic the Hedgehog | E-122-Psi | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | Rev 1.4 | 12 Feb 2012 |
| Mighty the Armadillo in Sonic the Hedgehog | E-122-Psi | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | 1.1 | 25 Nov 2011 |
| Metal Sonic in Sonic the Hedgehog | Lone Devil | Sonic the Hedgehog | Action > Platformer | GEN | G, S, T, GP, O | Improvement | 3.8 | 10 Nov 2014 |
| Doctor Robotnik's Creature Capture | MarkeyJester | Sonic the Hedgehog | Action > Platformer | GEN | G, L, T, GP | Complete | Rev 1.3 | 01 Apr 2012 |
| Sonic the Hedgehog 1 @ SAGE 2010 | Cinossu | Sonic the Hedgehog | Action > Platformer | GEN | G, T, O | Improvement | 1.0 | 08 Aug 2010 |
| Sonic 1 - Return to the Origin | carretero | Sonic the Hedgehog | Action > Platformer | GEN | GP | Improvement | 2.0 | 23 Oct 2007 |
| Sonic 1 Remastered | Puto | Sonic the Hedgehog | Action > Platformer | GEN | G, S | Improvement | 1.1 | 14 Jul 2007 |
