The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Zen Studios (Publisher) (4 members)
- Zereo (Developer) (1 member)
- ZeroDiv (Developer) (2 members)
- Zeroscale (Developer) (1 member)
- Zeroscale (Publisher) (1 member)
- Zindagi Games (Developer) (3 members)
- Zipper Interactive (Developer) (2 members)
- Zoink (Developer) (1 member)
- Zombie Apocalypse (Series) (2 members)
- Zombie Studios (Developer) (4 members)
- Zoo Games (Publisher) (1 member)
- Zoonami (Developer) (1 member)
- ZootFly (Developer) (3 members)
- Zoë Mode (Developer) (10 members)
- Zuxxez Entertainment (Developer) (1 member)
- Âge (Developer) (5 members)
- Étranges Libellules (Developer) (2 members)
- エクシング (Developer) (1 member)