| SoniNeko | Nineko | Sonic the Hedgehog | Action > Platformer | GEN | S, L, T | Improvement | 1.1.1 | 23 Nov 2008 |
| Sonic: The One Ring | Mercury | Sonic the Hedgehog | Action > Platformer | GEN | GP | Improvement | Revision # | 22 Nov 2010 |
| Sonic: Into The Void | Blueblur93 | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP, O | Complete | 4.1 | 20 Jul 2014 |
| Sonic: A Complete Mess | woring | Somari the Adventurer | Action > Platformer | NES | G, L, GP | Complete | 1.0 | 31 Mar 2022 |
| Sonic1 Spike Bug Fix & Spindash | Mariofan0 | Sonic the Hedgehog | Action > Platformer | GEN | G, GP | Improvement | 1.0 | 23 Feb 2008 |
| Sonic Zeta Overdrive | Mikel | Sonic the Hedgehog 2 | Action > Platformer | GEN | G, S, L, T, GP | Complete | 2009 Hacki | 06 Jul 2010 |
| Sonic With Fries | Afti | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP, O | Complete | Public Rel | 13 Oct 2009 |
| Sonic Winter Adventures | vladikcomper | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP, O | Complete | Final | 28 Apr 2013 |
| Sonic VR | ColinC10 | Sonic the Hedgehog 2 | Action > Platformer | GEN | G, S, L, T, GP | Complete | 1.0 | 18 Sep 2011 |
| Sonic Triple Trouble SMS | Glitch | Sonic the Hedgehog: Triple Trouble | Action > Platformer | GG | O | Improvement | 0.4 | 30 May 2009 |
| Sonic the Hedgehog: South Island Adventure | Hivebrain | Sonic the Hedgehog | Action > Platformer | GEN | G, L, GP | Improvement | 0.3 | 30 Apr 2004 |
| Sonic the Hedgehog: No Music Edition | Green Jerry | Sonic the Hedgehog | Action > Platformer | GEN | S | Improvement | 1.0 | 30 Jun 2020 |
| Sonic the Hedgehog Painful World Spikes Kaizo 2 | HARDCORE | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T | Complete | 1.5 | 07 Apr 2021 |
| Sonic the Hedgehog Painful World Spikes Kaizo | HARDCORE | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T | Complete | 1.0 | 09 Mar 2021 |
| Sonic the Hedgehog in Super Mario Bros. | Kengen | Super Mario Bros. | Action > Platformer | NES | G, T, GP | Improvement | 1.0 | 03 Mar 2018 |
| Sonic the Hedgehog Genesis (Genesis) | Xenowhirl | Sonic the Hedgehog | Action > Platformer | GEN | G, GP, O | Improvement | Release 2 | 06 Dec 2006 |
| Sonic the Hedgehog Classic Heroes | flamewing | Sonic the Hedgehog 2 | Action > Platformer | GEN | L, GP | Improvement | 0.10.008a | 01 Sep 2013 |
| Sonic the Hedgehog 2: Tohaka Version | Ultima | Sonic the Hedgehog 2 | Action > Platformer | GEN | G, L | Improvement | 0.21 | 07 May 2004 |
| Sonic the Hedgehog 2: MTAM the Perfect Existance | KojiChao | Sonic the Hedgehog 2 | Action > Platformer | GEN | G, L | Improvement | 1.0 | 10 Aug 2004 |
| Sonic the Hedgehog 2 XL | Captain Bozo | Sonic the Hedgehog 2 | Action > Platformer | GEN | G, GP | Complete | 1.0 | 12 Jul 2010 |
