Companies
- North Beach Games
- Nosebleed Interactive
- NovaLogic
- Numskull
- Numskull Games
- Nuverse
- Nvidia
- Nyxi
- Obsidian Entertainment
- Odd Meter
- Oddworld Inhabitants
- Offworld Industries
- Omega Force
- One or Eight INC.
- OneMoreLevel
- OnePlus
- Open Lab Games
- Oreville Studios
- Other Ocean Interactive
- Ouka Studios
- Outright Games
- Overhaul Games
- Overkill Software
- Owlcat Games
- Owlchemy Labs