The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 2020 (Initial release year) (1 member)
- 24 Caret Games (Developer) (1 member)
- 24 Caret Games (Publisher) (1 member)
- 2K Australia (Developer) (1 member)
- 2K Czech (Developer) (1 member)
- 2K Games (Developer) (1 member)
- 2K Games (Publisher) (21 members)
- 2K Marin (Developer) (2 members)
- 2K Sports (Publisher) (31 members)
- 2XL Games (Developer) (2 members)
- 2k Marin (Developer) (0 members)
- 345 Games (Publisher) (2 members)
- 38 Studios (Developer) (1 member)
- 3Division (Developer) (1 member)
- 49Games (Developer) (5 members)
- 4A Games (Developer) (1 member)
- 4J Studios (Developer) (2 members)
- 4hit (Publisher) (2 members)
- 4mm Games (Developer) (1 member)
- 505 Games (Publisher) (23 members)