The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Worms (Series) (5 members)
- Wow Entertainment (Developer) (2 members)
- Write color buffers: On (Config) (173 members)
- Write depth buffers: On (Config) (9 members)
- XCOM (Series) (3 members)
- XDev (Developer) (1 member)
- XGen Studios (Developer) (1 member)
- XGen Studios (Publisher) (1 member)
- XING (Developer) (1 member)
- XING (Publisher) (1 member)
- XPEC Entertainment (Developer) (3 members)
- XPEC Entertainment (Publisher) (1 member)
- Xseed Games (Publisher) (6 members)
- Yacht Club Games (Developer) (1 member)
- Yacht Club Games (Publisher) (1 member)
- Yager Development (Developer) (1 member)
- Yakuza (Series) (9 members)
- Yamasa (Developer) (2 members)
- Yamasa (Publisher) (1 member)
- Yamasa Digi (Series) (2 members)