Companies
- No More Robots
- Nokia
- Nordic Games
- North Beach Games
- Novarama
- Nuverse
- Nvidia
- NZXT
- Obsidian Entertainment
- Oculus VR
- Odd Bug Studio
- Odd Meter
- Office Create
- Offworld Industries
- Omega Force
- OneMoreLevel
- OnLive
- Onoma
- ORIGAME DIGITAL
- Origin8 Technologies Ltd
- OTA IMON Studio
- Other Ocean Interactive
- Otherside Entertainment
- Ouka Studios
- Outright Games