Companies
- SEGA
- SEGA Europe
- SEGA of America
- Semi Secret Software
- Serenity Forge
- Shared Memory
- Sharkmob
- Shedworks
- Shift
- Shift Up Corporation
- Shiro Games
- Shiro Unlimited
- SI Games
- SideQuest Studios
- Sierra Entertainment
- Silicon Studio
- Simogo
- Sirvo
- Ska Studios
- Skybound
- SkyBox Labs
- Skydance New Media
- Slavic Magic
- Sledgehammer Games
- Sleepy Giant Entertainment