| Spirit Revenge (ver. 1.0.9703) | yenrab | 1997-03-23 |
| 437 |
| Short-Lived Adventures of Hobo Dan, The | hob nado ◪ | 2005-12-15 |
| 361 |
| Snarfoogle | cheezit200 ◪ | |
| 351 |
| Shadowsong | Tixus/Esdemo1/Quasar84 | 2002-07-06 |
| 281 |
| Seiken Densetsu: Blade of Islan | djtiesto ◪ | 1997-08-14 |
| 240 |
| Smiley RPG | Mallo | 1997-12-23 |
| 240 |
| Spongko's Legendary Journey Demo | Eon Entertainment | |
| 225 |
| Spaceman Jones in: Ordeal on Glaxnard XIV (ver. 1.85) | KKairos ◪ | 2014-01-24 |
| 222 |
| Smash Time | Castlevania ◪ | |
| 218 |
| Super Mario for MZX Demo (ver. 1.26) | T-Bone ◪ | 2006-12-03 | No reviews. | 217 |
| Slave Pit | CHEZZY ◪ | 2006-12-31 |
| 215 |
| Stupid Tournament | hob nado ◪ | 2006-11-14 |
| 199 |
| SPECIAL QUEST! | Kuddy ◪ | 2005-04-01 |
| 184 |
| Stronghold Demo | Jauhis ◪ | 2010-01-31 |
| 183 |
| Super ASCII MZX Town! Part I (ver. 2.1) | zzo38 ◪ | | No reviews. | 167 |
| Snake Slayer 2013 (ver. 1.1) | KKairos ◪ | 2013-12-26 |
| 166 |
| Snarfoogle 2: Warp (ver. Demo 2) | cheezit200 ◪ | |
| 166 |
| Sonic Jam (ver. 0.8) | Zdrmonster1 ◪ | 2021-11-30 |
| 159 |
| Sivion (unfinished) | Monthigos ◪ | 1997-10-27 |
| 148 |
| Super Zero 2 | Static76 | |
| 145 |
| Super Mario Miniatures Demo | T-Bone ◪ | 2006-06-20 |
| 136 |
| SMZX Tetris | Akwende ◪ | | No reviews. | 135 |
| Shining Legend Demo | Waka | |
| 135 |
| Spirit Quest (ver. 2.0) | ThDPro ◪ | 2012-07-24 | No reviews. | 129 |
| Sivion Demo II | Monthigos ◪ | |
| 128 |
| Survival Challenge, The | KirbySSB ◪ | 2002-11-19 |
| 119 |
| Slimed! Demo (ver. 0.3) | Creator | |
| 119 |
| Scribbit's Mini Game | Scribbit | |
| 116 |
| SimStapler | weasel ◪ | 2009-01-20 |
| 115 |
| Sivion Preview | Monthigos ◪ | |
| 115 |
| Silence in the Theater | ThDPro ◪ | 2012-08-03 | No reviews. | 114 |
| Search, The | Easton Blue ◪ | 2001-11-04 |
| 114 |
| Starflight MZX (Project Dump) | Risu2112 ◪ | 2019-01-28 | No reviews. | 109 |
| Skateboard Dudes | Aeon17 ◪ | |
| 109 |
| Simply Psycho | Jairska | 1995-11-22 |
| 108 |
| Stair Dismount | Slinky ◪ | |
| 108 |
| Siphrian | Kayin/RoSS/Koji | 2001-07-21 |
| 107 |
| Silent Thunder Demo | Zoox 1 & 2 | 1999-01-19 |
| 107 |
| Sudoku Simulator | nooodl ◪ | 2009-06-03 | No reviews. | 106 |
| Some Stupid Quests (ver. 2) | Kuddy ◪ | 2010-01-15 |
| 105 |
| Stones and Roks II | zombieguy ◪ | 2003-05-03 |
| 105 |
| School Sucks Demo | Teevee | |
| 105 |
| Servo | Graham ◪ | 2003-04-20 | No reviews. | 104 |
| Super Zero | Static76 | | No reviews. | 104 |
| Super Chuck | Brian Palmer | |
| 104 |
| SEU | BiGBuBBa ◪ | | No reviews. | 103 |
| Shining Billy | Billy of America | 1998-06-00 |
| 103 |
| Second Search, The | Easton Blue ◪ | 2002-01-02 | No reviews. | 102 |
| SATAN | Baby Bonnie Hood ◪ | 2012-07-06 | No reviews. | 100 |
| Saga of Dan Demo | Nash ◪ | 1996-11-26 | No reviews. | 99 |
