| Swords Demo | zjm ◪ | 2008-06-02 |
| 69 |
| Survival Challenge, The | KirbySSB ◪ | 2002-11-19 |
| 130 |
| Super Zero 2 | Static76 | |
| 152 |
| Super Zero | Static76 | | No reviews. | 119 |
| Super World | Bugspray | |
| 101 |
| Super Mario Miniatures Demo | T-Bone ◪ | 2006-06-20 |
| 144 |
| Super Mario for MZX Demo (ver. 1.26) | T-Bone ◪ | 2006-12-03 | No reviews. | 225 |
| Super Jet Adventure | Hunter9656 | 1996-07-08 |
| 89 |
| Super Chuck | Brian Palmer | |
| 107 |
| Super ASCII MZX Town! Part I (ver. 2.1) | zzo38 ◪ | | No reviews. | 176 |
| Super ADVenture: The Journey Home (ver. 2.3) | STRIKESOFT | 1996-01-27 |
| 107 |
| Sudoku Simulator | nooodl ◪ | 2009-06-03 | No reviews. | 115 |
| Substance | Bramble ◪ | 2009-05-04 |
| 80 |
| Stupid Tournament | hob nado ◪ | 2006-11-14 |
| 208 |
| Stuff | paulguy ◪ | 2004-10-02 |
| 74 |
| Stronghold Demo | Jauhis ◪ | 2010-01-31 |
| 194 |
| Stones and Roks II | zombieguy ◪ | 2003-05-03 |
| 107 |
| Stones and Roks (ver. 1.3) | zombieguy ◪ | 2003-11-01 | No reviews. | 101 |
| Stolen Zambooboo Demo, The (ver. 1.2) | Brandon Faegre | 1996-11-27 |
| 82 |
| Stix Demo (ver. 2) | Glynth | 1999-10-21 | No reviews. | 97 |
| Stemilt | Bramble ◪ | 2005-12-13 |
| 77 |
| Steamed Hams but it's a Megazeux game | inmate2993 ◪ | 2025-09-23 | No reviews. | 44 |
| Stealth Boy Demo | Fighter_Phil ◪ | 2005-03-15 |
| 82 |
| Stargate | Lachesis ◪ | 2011-09-21 |
| 83 |
| Starforce: Space Adventure | MegaKev | |
| 20 |
| Starflight Mzx Combat Demo (ver. 1.52) | Risu2112 ◪ | 2019-01-13 | No reviews. | 100 |
| Starflight MZX (Project Dump) | Risu2112 ◪ | 2019-01-28 | No reviews. | 112 |
| Starfighters | Xzavier R | |
| 103 |
| Star Wars: Coruscant | KidAlex | |
| 85 |
| Star Wars | Joshua Booth | |
| 109 |
| Star Trip | Thundercloud ◪ | |
| 89 |
| Stair Dismount | Slinky ◪ | |
| 126 |
| Stafen War, The (Unfinished) | Chaos88 ◪ | 2015-08-14 | No reviews. | 75 |
| Squirm Wars 2 (Demo) | T-Bone ◪ | 2006-06-17 |
| 95 |
| Spy Guy 2 | Aeon17 ◪ | |
| 89 |
| Spy Guy | Aeon17 ◪ | |
| 100 |
| Sprite Catcher | Nanobot ◪ | 2002-09-29 |
| 97 |
| Spooky Boi | LogiCow ◪ | 2020-10-10 | No reviews. | 89 |
| Spongko's Legendary Journey Demo | Eon Entertainment | |
| 232 |
| Spoder Road | Nemesis^ | 1997-07-23 |
| 103 |
| Spirit Revenge (ver. 1.0.9703) | yenrab | 1997-03-23 |
| 507 |
| Spirit Quest (ver. 2.0) | ThDPro ◪ | 2012-07-24 | No reviews. | 134 |
| SpellWeavre | SpellWeavre ◪ | 1997-01-19 | No reviews. | 50 |
| SPECIAL QUEST! | Kuddy ◪ | 2005-04-01 |
| 194 |
| Spaceman Jones in: Ordeal on Glaxnard XIV (ver. 1.85) | KKairos ◪ | 2014-01-24 |
| 230 |
| Space Station 2: Planetary Warp (demo) | Sonic1126 ◪ | 2000-08-21 |
| 97 |
| Space Station (demo) | Sonic1126 ◪ | 2000-03-29 |
| 92 |
| Space Battles | Bugspray | |
| 90 |
| South Park Demo | Stewart Fullerton & James Greenwood | |
| 90 |
| Sonic's Quest | Sonic64 | |
| 100 |
