The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- .theprodukkt (Developer) (1 member)
- 10tons (Developer) (4 members)
- 10tons (Publisher) (3 members)
- 11 bit studios (Developer) (1 member)
- 1C Company (Publisher) (1 member)
- 2006 (Initial release year) (31 members)
- 2007 (Initial release year) (113 members)
- 2008 (Initial release year) (167 members)
- 2009 (Initial release year) (228 members)
- 2010 (Initial release year) (273 members)
- 2011 (Initial release year) (334 members)
- 2012 (Initial release year) (281 members)
- 2013 (Initial release year) (275 members)
- 2014 (Initial release year) (196 members)
- 2015 (Initial release year) (132 members)
- 2016 (Initial release year) (54 members)
- 2017 (Initial release year) (15 members)
- 2018 (Initial release year) (2 members)
- 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) (4 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)
- 5pb. (Developer) (22 members)
- 5pb. (Publisher) (32 members)
- 5pb. Games (Publisher) (1 member)
- 8bit Games (Developer) (1 member)
- 8floor (Publisher) (3 members)
- A.C.R.O.N.Y.M. Games & Eyerisk Studios (Developer) (1 member)
- A.C.R.O.N.Y.M. Games (Developer) (1 member)
- ACE Team (Developer) (3 members)
- AFL Live (Series) (2 members)
- Aabs (Developer) (1 member)
- Aabs (Publisher) (1 member)
- Abstraction Games (Developer) (3 members)