Companies
- SEGA
- SEGA Australia
- SEGA Corporation
- SEGA Europe
- SEGA Hardlight
- SEGA Japan
- SEGA of America
- SEGA Sammy Holdings
- Seismic Games
- SELL
- Sensor Tower
- Sensory Sweep
- Series AI
- Series Entertainment
- Serious Games Interactive
- Serious parody
- Setgo Limited
- Seven45 Studios
- SFB Games
- SGN
- SgtOkiDoki
- Shaba Games
- Shanda Games
- Shanda Interactive Entertainment
- Shapeshifter Games