| Savager Hunt | ZZTurbo | |
| 88 |
| Super ASCII MZX Town! Part I (ver. 2.1) | zzo38 ◪ | | No reviews. | 167 |
| Silent Thunder Demo | Zoox 1 & 2 | 1999-01-19 |
| 107 |
| Stones and Roks II | zombieguy ◪ | 2003-05-03 |
| 105 |
| Stones and Roks (ver. 1.3) | zombieguy ◪ | 2003-11-01 | No reviews. | 98 |
| Swords Demo | zjm ◪ | 2008-06-02 |
| 66 |
| Sonic Jam (ver. 0.8) | Zdrmonster1 ◪ | 2021-11-30 |
| 159 |
| Spirit Revenge (ver. 1.0.9703) | yenrab | 1997-03-23 |
| 437 |
| Starfighters | Xzavier R | |
| 95 |
| SimStapler | weasel ◪ | 2009-01-20 |
| 115 |
| Silence: Revised Edition | weasel ◪ | 2007-01-15 | No reviews. | 78 |
| Silence | weasel ◪ | 2005-09-08 |
| 86 |
| Shining Legend Demo | Waka | |
| 135 |
| Shoot 'Em! | Tyler "Crackerjack" McDonald | |
| 93 |
| Snowman Smash | Triterra | |
| 78 |
| Smiley Knights | Triterra | |
| 80 |
| Shadowsong 2 Demo | Tixus/Esdemo1/Wervyn | |
| 81 |
| Shadowsong | Tixus/Esdemo1/Quasar84 | 2002-07-06 |
| 281 |
| Star Trip | Thundercloud ◪ | |
| 81 |
| Silence in the Theater | ThDPro ◪ | 2012-08-03 | No reviews. | 114 |
| Spirit Quest (ver. 2.0) | ThDPro ◪ | 2012-07-24 | No reviews. | 129 |
| School Sucks Demo | Teevee | |
| 105 |
| Super Mario for MZX Demo (ver. 1.26) | T-Bone ◪ | 2006-12-03 | No reviews. | 217 |
| Super Mario Miniatures Demo | T-Bone ◪ | 2006-06-20 |
| 136 |
| Squirm Wars 2 (Demo) | T-Bone ◪ | 2006-06-17 |
| 90 |
| SK8 2004 Demo | Switchblade ◪ | |
| 79 |
| Ski 2004 | Switchblade ◪ | |
| 82 |
| Super ADVenture: The Journey Home (ver. 2.3) | STRIKESOFT | 1996-01-27 |
| 94 |
| South Park Demo | Stewart Fullerton & James Greenwood | |
| 86 |
| Super Zero | Static76 | | No reviews. | 104 |
| Super Zero 2 | Static76 | |
| 145 |
| SpellWeavre | SpellWeavre ◪ | 1997-01-19 | No reviews. | 43 |
| Sonic's Quest | Sonic64 | |
| 96 |
| Space Station 2: Planetary Warp (demo) | Sonic1126 ◪ | 2000-08-21 |
| 95 |
| Space Station (demo) | Sonic1126 ◪ | 2000-03-29 |
| 83 |
| Stair Dismount | Slinky ◪ | |
| 108 |
| Shloober Stockpile 2: BrainFart | ShloobeR ◪ | 2008-01-01 |
| 67 |
| Shloober Stockpile 1: ClockTower | ShloobeR ◪ | 2008-01-01 | No reviews. | 74 |
| Scribbit's Mini Game | Scribbit | |
| 116 |
| Starflight MZX (Project Dump) | Risu2112 ◪ | 2019-01-28 | No reviews. | 109 |
| Starflight Mzx Combat Demo (ver. 1.52) | Risu2112 ◪ | 2019-01-13 | No reviews. | 90 |
| SaintZZT 7th DX (ver. 1.2) | RinGames ◪ | 2014-12-31 | No reviews. | 84 |
| Silent Death Demo | Razerboy ◪ | |
| 79 |
| Slider Puzzle | RatoN ◪ | 2005-06-06 | No reviews. | 91 |
| Some | RakiSoft | |
| 87 |
| Shock and Awe and a Whimper | pbl.fyi ◪ | 2017-04-26 | No reviews. | 51 |
| Stuff | paulguy ◪ | 2004-10-02 |
| 70 |
| Serrated Episode Zero: Confrontation | Pancake ◪ | 2006-06-14 |
| 87 |
| Shocked Demo | Pancake ◪ | 2006-07-22 |
| 84 |
| Secret Demo | Pancake ◪ | 2006-07-17 |
| 86 |
