| S.W.A.T. | Bramble ◪ | |
| 56 |
| Sacred Gem Demo | Pancake ◪ | 2006-05-29 |
| 65 |
| Saga of Dan Demo | Nash ◪ | | No reviews. | 66 |
| SaintZZT 7th DX (ver. 1.2) | RinGames ◪ | 2014-12-31 | No reviews. | 52 |
| SATAN | Baby Bonnie Hood ◪ | 2012-07-06 | No reviews. | 66 |
| Savager Hunt | ZZTurbo | |
| 55 |
| School Sucks Demo | Teevee | |
| 67 |
| Scribbit's Mini Game | Scribbit | |
| 77 |
| Seamus' Bad Day | NoahSoft / Jessie | 2006-10-02 |
| 58 |
| Search, The | Easton Blue ◪ | 2001-11-04 |
| 78 |
| Second Search, The | Easton Blue ◪ | 2002-01-02 | No reviews. | 69 |
| Secret Demo | Pancake ◪ | 2006-07-17 |
| 54 |
| Secret Untold, The | Dragtaur / MetaMagus | 1997-03-17 | No reviews. | 15 |
| Seiken Densetsu: Blade of Islan | djtiesto ◪ | 1997-08-14 |
| 144 |
| Serrated Episode Zero: Confrontation | Pancake ◪ | 2006-06-14 |
| 56 |
| Servo | Graham ◪ | 2003-04-20 | No reviews. | 63 |
| SEU | BiGBuBBa ◪ | | No reviews. | 73 |
| Shadow Hunters | Chaos88 ◪ | 2015-08-18 | No reviews. | 58 |
| Shadowblade | Fred ◪ | |
| 59 |
| Shadowed | Joseph Toscano | 1997-01-01 |
| 59 |
| Shadowsong | Tixus/Esdemo1/Quasar84 | 2002-07-06 |
| 191 |
| Shadowsong 2 Demo | Tixus/Esdemo1/Wervyn | |
| 50 |
| Shining Billy | Billy of America | |
| 67 |
| Shining Legend Demo | Waka | |
| 95 |
| Shloober Stockpile 1: ClockTower | ShloobeR ◪ | 2008-01-01 | No reviews. | 44 |
| Shloober Stockpile 2: BrainFart | ShloobeR ◪ | 2008-01-01 |
| 41 |
| Shock and Awe and a Whimper | pbl.fyi ◪ | 2017-04-26 | No reviews. | 18 |
| Shocked Demo | Pancake ◪ | 2006-07-22 |
| 57 |
| Shoot 'Em! | Tyler "Crackerjack" McDonald | |
| 61 |
| Shooting Game Demo | Nytar ◪ | 2006-12-16 |
| 62 |
| Short-Lived Adventures of Hobo Dan, The | hob nado ◪ | 2005-12-15 |
| 275 |
| Sid's Quest (Incomplete) | MattSplatW ◪ | 2006-10-29 | No reviews. | 46 |
| Silence | weasel ◪ | 2005-09-08 |
| 54 |
| Silence in the Theater | ThDPro ◪ | 2012-08-03 | No reviews. | 85 |
| Silence: Revised Edition | weasel ◪ | 2007-01-15 | No reviews. | 48 |
| Silent Death Demo | Razerboy ◪ | |
| 50 |
| Silent Thunder Demo | Zoox 1 & 2 | |
| 67 |
| Simply Psycho | Jairska | 1995-11-22 |
| 70 |
| SimStapler | weasel ◪ | 2009-01-20 |
| 78 |
| SimStapler HD | hayashi ◪ | 2009-01-21 |
| 65 |
| Siphrian | Kayin/RoSS/Koji | 2001-07-21 |
| 68 |
| Sivion (unfinished) | Monthigos ◪ | 1997-10-27 |
| 96 |
| Sivion Demo II | Monthigos ◪ | |
| 82 |
| Sivion Preview | Monthigos ◪ | |
| 71 |
| SK8 2004 Demo | Switchblade ◪ | |
| 50 |
| Skateboard Dudes | Aeon17 ◪ | |
| 71 |
| Ski 2004 | Switchblade ◪ | |
| 56 |
| Slave Pit | CHEZZY ◪ | 2006-12-31 |
| 126 |
| sleepdrm failure files (ver. 0.2) | KKairos ◪ | 2017-01-31 |
| 32 |
| Slider Puzzle | RatoN ◪ | 2005-06-06 | No reviews. | 58 |
