| Publisher | Games | Geek | Avg |
|---|
| Skybound Tabletop | 29 | 5.75 | 6.66 |
| Skycastle Studios | 1 | — | — |
| Skye Marketing Corporation | 2 | — | — |
| Skyler Imagination | 1 | — | — |
| Skyline Toys | 1 | — | — |
| Skyport Games | 1 | — | — |
| Skytear Games | 5 | 5.85 | 8.04 |
| Sladecolour Board Games | 3 | — | — |
| Sladen Publications | 1 | — | — |
| Slættaratindur AB | 2 | — | — |
| Slag-Bla entertainment (now XXXenophile Books) | 2 | — | — |
| Sleuth Publications | 4 | — | — |
| Sligro | 1 | — | — |
| Slinky Gibbon Games | 1 | — | — |
| SlugFest Games | 21 | 5.77 | 6.91 |
| Sly Frog Games | 1 | — | — |
| Sly Game Design | 1 | — | — |
| Small Box Games | 41 | 5.56 | 6.74 |
| Small Foot Company | 3 | — | — |
| Small World Toys | 2 | — | — |
| Smart Chick | 1 | — | — |
| Smart Cookie Games | 1 | — | — |
| Smart Flamingo | 10 | 5.58 | 7.37 |
| Smart Games | 1 | — | — |
| Smart Games EU | 7 | 5.56 | 6.53 |
| Smart Games, Inc. | 2 | — | — |
| Smart Iguana Games, LLC | 2 | — | — |
| Smart Ltd | 65 | 6.33 | 6.61 |
| Smart Play Games | 8 | 5.55 | 6.32 |
| Smart Toys and Games, Inc. | 8 | 6.39 | 6.90 |
| Smart Troll Games | 6 | 5.60 | 6.94 |
| Smart Zone Games | 4 | — | — |
| Smartass Games Ltd. | 1 | — | — |
| Smartegg Games Ltd. | 1 | — | — |
| SmartPlay Editorial (SP) | 2 | — | — |
| SMB Paris | 1 | — | — |
| Smeets & Schippers | 7 | 5.55 | 5.87 |
| SMĚR, výrobní družstvo | 1 | — | — |
| Smethport Specialty Co. | 6 | 5.03 | 4.74 |
| Smiggle | 1 | — | — |
| Smile | 1 | — | — |
| Smiley POP | 1 | — | — |
| Smiling Goblin | 2 | — | — |
| Smiling Monster Games | 6 | 5.66 | 6.28 |
| Smirk & Dagger Games | 36 | 5.72 | 6.62 |
| Smirk & Laughter Games | 9 | 5.91 | 6.81 |
| Smiths Crisps | 1 | — | — |
| Smithsonian Institute | 1 | — | — |
| Smoothie Games | 2 | — | — |
| Smurfit Games | 1 | — | — |
| Snafoo Games, Inc. | 2 | — | — |
| SNAFU Design | 8 | 5.55 | 7.89 |
| SNAK | 3 | — | — |
| Snake Eyes Games | 1 | — | — |
| Snake Oil, LLC | 1 | — | — |
| Snap Ships | 1 | — | — |
| Snap TV Games | 1 | — | — |
| Snarling Badger Studios | 3 | — | — |
| Snovid | 2 | — | — |
| SnowBoardGames | 2 | — | — |
| Snowbright Studio | 1 | — | — |
| Snowdale Design | 7 | 6.21 | 7.43 |
| So Way Totally Awesome Games | 1 | — | — |
| Soaring Rhino | 2 | — | — |
| Sobremesa | 1 | — | — |
| Social Games | 1 | — | — |
| Social Hour Games | 1 | — | — |
| Social Sloth Games | 5 | 5.64 | 6.48 |
| Società Editrice Internazionale | 1 | — | — |
| Société Française de Jeux et Jouets | 1 | — | — |
| Société Générale Polishes | 1 | — | — |
| SoCoGe | 1 | — | — |
| Soda Pop Miniatures | 10 | 5.61 | 6.13 |
| Sofa Games | 2 | — | — |
| SoftBank Corp. | 1 | — | — |
| Software Creations Ltd. | 1 | — | — |
| Solar Games | 1 | — | — |
| Solar Jogos & Entretenimento | 1 | — | — |
| SolarFlare Games | 6 | 5.52 | 6.16 |
| Solbenk | 1 | — | — |
| Soldiers, Sailors and Airmen's Families Association | 1 | — | — |
| Solid Rock Games | 1 | — | — |
| Solid Roots, LLC | 4 | — | — |
| Solis Game Studio | 5 | 5.54 | 6.97 |
| Solitary Division | 1 | — | — |
| Solsora Games | 1 | — | — |
| SoLunerG | 1 | — | — |
| Solvay S.A. | 1 | — | — |
| Somac Inc. | 1 | — | — |
| Sombreros Production | 3 | — | — |
| Some"R"Set Card Co. | 1 | — | — |
| Somerville Ltd. | 9 | 5.50 | 5.17 |
| Sondertyp-Zigaretten | 1 | — | — |
| Sony Computer Entertainment (SCE) | 1 | — | — |
| Sony Interactive Entertainment, LLC | 1 | — | — |
| Sophisticated Cerberus Games, LLC | 2 | — | — |
| Sophisticated Games | 27 | 5.93 | 6.02 |
| Soppol | 2 | — | — |
| Soragame Studio | 2 | — | — |
| Sordane Publishing | 1 | — | — |
