| Sonic 1 Reversed Frequencies | FraGag | Sonic the Hedgehog | Action > Platformer | GEN | S | Improvement | 1.0 | 06 Jan 2010 |
| Sonic 1 Remastered | Puto | Sonic the Hedgehog | Action > Platformer | GEN | G, S | Improvement | 1.1 | 14 Jul 2007 |
| Sonic 1 Megamix | Stealth | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP | Complete | 3.0 | 14 Aug 2008 |
| Sonic 1 Improvement | Penta Penguin | Sonic the Hedgehog | Action > Platformer | SMS | T, GP | Improvement | 1.31 | 15 Aug 2020 |
| Sonic 1 Color Contrast | TheInvisibleSun | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP, O | Complete | 4.3 | 22 Dec 2013 |
| Sonic 1 Character Pak | LuigiXHero | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L | Complete | 1.0 | 12 Oct 2020 |
| Sonic 1 Bugfixes & Optional Act Palettes | mcginnis03 | Sonic the Hedgehog | Action > Platformer | GEN | G, L, GP | Bug Fix | 1.1 | 22 Feb 2020 |
| Sonic 1 Bugfix | lory1990 | Sonic the Hedgehog | Action > Platformer | GEN | GP | Bug Fix | 1.0 | 14 Nov 2016 |
| Sonic 1 and 2 | ColinC10 | Sonic the Hedgehog 2 | Action > Platformer | GEN | L, O | Improvement | Revision 1 | 11 Dec 2010 |
| Sonic 1 Alt | Ell678 | Sonic the Hedgehog | Action > Platformer | GEN | L, GP, O | Complete | Final Vers | 30 Jul 2010 |
| Sonic 1 - YOLO Edition | ABOhiccups | Sonic the Hedgehog | Action > Platformer | GEN | L, T, GP | Complete | 1.0 | 05 Oct 2014 |
| Sonic 1 - Return to the Origin | carretero | Sonic the Hedgehog | Action > Platformer | GEN | GP | Improvement | 2.0 | 23 Oct 2007 |
| Sonic (SMK) | 8-NabBit | Mario Kart: Super Circuit | Racing | GBA | G, T | Complete | 1.0 | 27 May 2022 |
| Sonic & Knuckles Reversed Frequencies | FraGag | Sonic & Knuckles | Action > Platformer | GEN | S | Improvement | 1 | 06 Jan 2010 |
| Son Goku Playable in Castlevania: Dawn of Sorrow | Shametal | Castlevania: Dawn of Sorrow | Role Playing > Action RPG | NDS | G, T, GP | Complete | 1.0 | 28 Dec 2022 |
| Something Else | Yogui | Super Mario World | Action > Platformer | SNES | G, S, L, T, GP, O | Complete | 1.02 | 21 Feb 2014 |
| Something | Yogui | Super Mario World | Action > Platformer | SNES | G, S, L, T | Complete | 1.0b | 01 Jun 2011 |
| Somari the Adventurer | Lone Devil | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP | Improvement | 1.1 | 19 Oct 2015 |
| Somari 22: The Hacks Strike Back! | POLARIA POYON | Super Mario Bros. | Action > Platformer | NES | G, S, L, T, GP | Complete | 1.0 | 27 Sep 2022 |
| Solstice: The Revenge of Benzou | PPI_Akiko | Solstice: The Quest for the Staff of Demnos | Puzzle | NES | G, L, T | Improvement | 1.2 | 23 Aug 2021 |
