25 wads
| File | Name | Author | Iwad | Demos | Length |
|---|---|---|---|---|---|
| sinergy | SINERGY | Glen Christie | doom | 48 | 3:04:23 |
| sinfun | sinfun | Firefish | doom2 | 1 | 4:09 |
| sinseven | Sinister Seven - Vanil... | Doomkid [Adam P.] | doom2 | 4 | 3:01 |
| sirius1 | sirius1 | Chris Arkenberg | doom2 | 1 | 1:27 |
| sisocran | sisocran | Espi | doom2 | 1 | 4:10 |
| sixareas | sixareas | Doug Ryerson | doom | 1 | 5:39 |
| sjs01 | sjs01 | Simon Judd | doom2 | 1 | 7:12 |
| sjs02 | sjs02 | Simon Judd | doom2 | 3 | 16:27 |
| skepland | skepland | Monakhov Vladimir | plutonia | 11 | 3:00:38 |
| skibidi | Skibiditernal | Friedrich Krügel (Drop Dead Fred) | doom2 | 1 | 1:03:58 |
| skipper | Skipper | Ribbiks | doom2 | 1 | 3:59 |
| skirmish_pvm | Skirmish: PvM Edition | Argent Agent | doom2 | 51 | 2:18:53 |
| skuldash | skuldash | Joshua O'Sullivan | doom2 | 3 | 1:13 |
| skulkeep | skulkeep | Marcus Malden | doom2 | 4 | 8:36 |
| skull | skull.WAD | Malcolm Sailor | doom | 1 | 4:22 |
| skull2 | skull2 | Rob Morton | doom | 1 | 6:45 |
| skulls | Die, bastards! | Lassi Ahola-Huhta | doom | 5 | 16:41 |
| skulltiverse | Skulltiverse (version ... | ViolentBeetle et al | doom2 | 10 | 54:08 |
| skycity | skycity | Darren McKeigan | doom | 1 | 4:57 |
| skyewood | skyewood | Steve Rescoe | doom2 | 10 | 28:40 |
| skylab | skylab | Matt Robinson | doom2 | 2 | 10:15 |
| skywater | skywater | Sam Ketner | doom2 | 3 | 6:50 |
| sl | sl | ArmouredBlood | doom2 | 20 | 2:38:05 |
| slaughter | slaughter | Unknown | doom2 | 5 | 21:04 |
| slayer | slayer | Richard Wiles | doom2 | 146 | 10:24:54 |