| Snake's Revenge MMC5 Patch | Dracula X | Snake's Revenge | Action Adventure | NES | O | Improvement | 1.0a | 14 Jun 2020 |
| Snoopy's Silly Sports Spectacular MMC1 to MMC3 | BZK | Snoopy's Silly Sports Spectacular! | Sports | NES | O | Improvement | 001 | 05 Oct 2016 |
| Snow Brothers - Return of the King Scorch | lancuster | Snow Brothers | Action > Platformer | NES | G, L, T, O | Complete | 1.0 | 11 Jan 2017 |
| World Cup 2002 | New Game Star | Soccer | Sports | NES | G | Complete | 1.0 | 01 Jan 2002 |
| Euro 2016 Soccer | DANGER X | Soccer | Sports | NES | G, T | Improvement | 1.0 | 02 Jul 2016 |
| Solomon's Key - Unlocked | Aether Knight | Solomon's Key | Puzzle | NES | L, T | Complete | 1.0 | 02 Feb 2020 |
| Solstice Manual Randomizer | Jp32 | Solstice: The Quest for the Staff of Demnos | Puzzle | NES | L, T | Improvement | 1.0 | 20 Jun 2018 |
| Sonic Level Fix | Hybrid | Somari the Adventurer | Action > Platformer | NES | O | Bug Fix | 1.1 | 11 Oct 2016 |
| Sonic The Hedgehog (NES) Improvement V1.0 | the jabu | Somari the Adventurer | Action > Platformer | NES | G, GP | Improvement | 1.0 | 20 Nov 2016 |
| 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 |
