Group
- Nozomi Entertainment1
- OLL Chess Club1
- OUBLIETTE1
- Ottawa Red Shirts95
- Out of the Box Publishing31
- PHOENIX Interactive GmbH7
- PST Productions35
- Paizo Publishing, LLC47
- Pantheon Press, LLC2
- Paradigm Concepts2
- Paragon Notion9
- Party of One2
- Penrose Press3
- Peryton Gamers10
- Pinnacle Entertainment Group1
- Plaid Chameleon Games10
- Planewalker.com2
- Player vs Player Events3
- Playroom Entertainment88
- Poisoned Shadows4