Companies
- Second Dinner
- Secret Mode
- SEGA
- SEGA Corporation
- SEGA Europe
- SEGA Hardlight
- SEGA of America
- Serenity Forge
- Sharkmob
- Shift Up Corporation
- Shiro Games
- SIE Japan Studio
- SIE Santa Monica Studio
- Sierra Entertainment
- Silicon Studio
- Ska Studios
- Skybound
- Slant Six Games
- Slavic Magic
- Sledgehammer Games
- Slipgate Ironworks
- Slitherine Software UK
- Sloclap
- Snail Games USA
- SNK