Game System
- RuneQuest1
- SUSS, the Sorta Universal Swashbuckling System1
- Sadaam Rules by Peter Panzeri1
- Shazamm!1
- Shifting Sands1
- Shipwrecked1
- Sign in Stranger1
- Silent Death (I.C.E.)1
- Snorta1
- Sorcerer1
- Squint1
- Strange Synergy1
- Struggle of Empires1
- Tracks to Titicaca1
- Transamerica1
- Trump, Tricks, Game"1
- Tut1
- Twilght Imperium1
- Ubiquity Roleplaying1
- Up Front (Avalon Hill)1