| Stix Demo (ver. 2) | Glynth | 1999-10-21 | No reviews. | 75 |
| Super Zero | Static76 | | No reviews. | 83 |
| Stones and Roks (ver. 1.3) | zombieguy ◪ | 2003-11-01 | No reviews. | 80 |
| Slider Puzzle | RatoN ◪ | 2005-06-06 | No reviews. | 77 |
| Servo | Graham ◪ | 2003-04-20 | No reviews. | 86 |
| Saga of Dan Demo | Nash ◪ | | No reviews. | 84 |
| Second Search, The | Easton Blue ◪ | 2002-01-02 | No reviews. | 83 |
| Sid's Quest (Incomplete) | MattSplatW ◪ | 2006-10-29 | No reviews. | 63 |
| Super Mario for MZX Demo (ver. 1.26) | T-Bone ◪ | 2006-12-03 | No reviews. | 177 |
| SEU | BiGBuBBa ◪ | | No reviews. | 87 |
| Silence: Revised Edition | weasel ◪ | 2007-01-15 | No reviews. | 64 |
| Shloober Stockpile 1: ClockTower | ShloobeR ◪ | 2008-01-01 | No reviews. | 63 |
| SMZX Tetris | Akwende ◪ | | No reviews. | 97 |
| Sudoku Simulator | nooodl ◪ | 2009-06-03 | No reviews. | 88 |
| Super ASCII MZX Town! Part I (ver. 2.1) | zzo38 ◪ | | No reviews. | 142 |
| Spirit Quest (ver. 2.0) | ThDPro ◪ | 2012-07-24 | No reviews. | 110 |
| Silence in the Theater | ThDPro ◪ | 2012-08-03 | No reviews. | 99 |
| SATAN | Baby Bonnie Hood ◪ | 2012-07-06 | No reviews. | 84 |
| SaintZZT 7th DX (ver. 1.2) | RinGames ◪ | 2014-12-31 | No reviews. | 72 |
| Stafen War, The (Unfinished) | Chaos88 ◪ | 2015-08-14 | No reviews. | 55 |
| Shadow Hunters | Chaos88 ◪ | 2015-08-18 | No reviews. | 82 |
| Starflight Mzx Combat Demo (ver. 1.52) | Risu2112 ◪ | 2019-01-13 | No reviews. | 74 |
| Starflight MZX (Project Dump) | Risu2112 ◪ | 2019-01-28 | No reviews. | 87 |
| Spooky Boi | LogiCow ◪ | 2020-10-10 | No reviews. | 65 |
| SpellWeavre | SpellWeavre ◪ | 1997-01-19 | No reviews. | 26 |
| Secret Untold, The | Dragtaur / MetaMagus | 1997-03-17 | No reviews. | 34 |
| Shock and Awe and a Whimper | pbl.fyi ◪ | 2017-04-26 | No reviews. | 36 |
| Skateboard Dudes | Aeon17 ◪ | |
| 93 |
| Smiley Knights | Triterra | |
| 64 |
| Snakes 2000 | Alan Iversen | |
| 68 |
| Some | RakiSoft | |
| 72 |
| South Park Demo | Stewart Fullerton & James Greenwood | |
| 70 |
| Space Battles | Bugspray | |
| 65 |
| Space Station 2: Planetary Warp (demo) | Sonic1126 ◪ | 2000-08-21 |
| 82 |
| Spy Guy | Aeon17 ◪ | |
| 70 |
| Star Wars: Coruscant | KidAlex | |
| 59 |
| Super World | Bugspray | |
| 77 |
| Silent Death Demo | Razerboy ◪ | |
| 65 |
| Stuff | paulguy ◪ | 2004-10-02 |
| 55 |
| School Sucks Demo | Teevee | |
| 83 |
| Snowman Smash | Triterra | |
| 61 |
| Super ADVenture: The Journey Home (ver. 2.3) | STRIKESOFT | 1996-01-27 |
| 74 |
| Starforce: Space Adventure | MegaKev | |
| 72 |
| Savager Hunt | ZZTurbo | |
| 74 |
| Super Jet Adventure | Hunter9656 | 1996-07-08 |
| 63 |
| Shadowblade | Fred ◪ | |
| 80 |
| Shining Billy | Billy of America | 1998-06-00 |
| 82 |
| Sprite Catcher | Nanobot ◪ | 2002-09-29 |
| 72 |
| Star Trip | Thundercloud ◪ | |
| 65 |
| Stolen Zambooboo Demo, The (ver. 1.2) | Brandon Faegre | 1996-11-27 |
| 57 |
