| Sonic The Hedgehog (NES) Improvement V1.0 + Music | Ti | Somari the Adventurer | Action > Platformer | NES | S | Addendum | 1.0 | 01 Dec 2016 |
| Sonic The Hedgehog (NES) Improvement V1.0 + Graphics | Terwilf | Somari the Adventurer | Action > Platformer | NES | G, O | Addendum | 1.0 | 05 Dec 2016 |
| Sonic The Hedgehog (NES) Improvement + Music and Graphics V 1.2 | FuriousHedgehog | Somari the Adventurer | Action > Platformer | NES | G, S | Addendum | 1.2 | 15 Dec 2017 |
| Sonic Improvement Vol.2 | Terwilf | Somari the Adventurer | Action > Platformer | NES | G, S, L, T | Improvement | 1.4 | 22 Oct 2020 |
| Myon Myon | DASTARD | Son Son | Action > Platformer | NES | G, T | Improvement | 1.0 | 01 Sep 2007 |
| Sonic & Knuckles Reversed Frequencies | FraGag | Sonic & Knuckles | Action > Platformer | GEN | S | Improvement | 1 | 06 Jan 2010 |
| Knuckles & Tails | SonicHalloween | Sonic 3 & Knuckles | Action > Platformer | GEN | GP | Improvement | 1.0 | 29 Nov 2006 |
| Sonic 3 and Amy Rose | E-122-Psi | Sonic 3 & Knuckles | Action > Platformer | GEN | G, GP | Improvement | 1.4 | 14 Jun 2013 |
| Sonic 3 & Knuckles: The Challenges | ColinC10 | Sonic 3 & Knuckles | Action > Platformer | GEN | L, O | Improvement | 1.0 | 11 Sep 2009 |
| Sonic 3 Complete | Tiddles | Sonic 3 & Knuckles | Action > Platformer | GEN | S, L, O | Improvement | 130810 | 10 Aug 2013 |
| Metal Sonic in Sonic the Hedgehog 3 & Knuckles | Lone Devil | Sonic 3 & Knuckles | Action > Platformer | GEN | G, T, GP | Improvement | 1.5 | 19 Sep 2014 |
| Sonic 3D Blast Time Attack | fabio | Sonic 3D Blast | Action | GEN | L | Improvement | 1.0 | 06 Feb 2007 |
| Super Sonic in Sonic 3D | Sik | Sonic 3D Blast | Action | GEN | G, GP | Improvement | 1.0 | 09 Aug 2010 |
| Sonic 3D: No Flickies | Sik | Sonic 3D Blast | Action | GEN | GP | Improvement | 1.2 | 04 Jan 2009 |
| Sonic 3D Blast: Director's Cut | GameHut | Sonic 3D Blast | Action | GEN | G, S, L, T, GP, O | Improvement | 1.0 | 25 Dec 2017 |
| Sonic Advance 3: Extreem Manseckz | Heran Bago | Sonic Advance 3 | Action | GBA | G, S, T | Complete | 1.0 | 29 Jul 2005 |
| Sonic CD + + | qiuu | Sonic CD | Action > Platformer | SegaCD | GP | Improvement | 1 | 20 Jun 2009 |
| Sonic CD Pal to NTSC Complete Patch | RoberMC | Sonic CD | Action > Platformer | SegaCD | O | Improvement | 1.0 | 17 May 2018 |
| Metal Sonic in Sonic CD 2011 (Playable) | Lone Devil | Sonic CD 2011 | Action > Platformer | PC | G, S, T | Improvement | 1.0 | 31 Oct 2014 |
| Sonic Drift 2 SMS | Shibunoa | Sonic Drift 2 | Racing | SMS | G, O | Improvement | b2 | 01 Jun 2009 |
