Companies
- Sharkmob
- Shenandoah Studio
- Sheridans
- Sheridans Solicitors
- Shift Up Corporation
- Shiny Entertainment
- Shipyard Games
- Shiro Games
- Shopto.net
- Shorelines Games
- Short N Sweet Games
- ShortRound Games
- Shueisha Games
- Side
- Sidelines
- Sidhe
- SIE Santa Monica Studio
- Sierra Entertainment
- Sierra Online
- Sigil Games Online
- Signal Hill Capital Group
- Signal Studios
- Silicon Knights
- Silicon Sisters Interactive Inc.
- Silicon Studio