The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 188 Trading Post (2 members)
- 188 Trading Post characters (9 members)
- 2009 news (12 members)
- 2010 news (38 members)
- 2011 news (12 members)
- 2012 news (12 members)
- 2013 community news (10 members)
- 2013 news (13 members)
- 2014 community news (12 members)
- 2014 news (13 members)
- 2015 community news (12 members)
- 2015 news (13 members)
- 2016 community news (12 members)
- 2016 news (13 members)
- 2017 community news (12 members)
- 2017 news (13 members)
- 2018 community news (12 members)
- 2018 news (13 members)
- 2019 community news (30 members)
- 2019 news (13 members)
- 2020 community news (23 members)
- 2020 news (13 members)
- 2021 community news (12 members)
- 2021 news (12 members)
- 2022 community news (5 members)
- 2022 news (12 members)
- 2023 news (12 members)
- 2024 news (0 members)
- ATLAS Observatory characters (4 members)
- Abandoned mines (8 members)
- Abbreviation templates (4 members)
- Abraxodyne Chemical (7 members)
- Abraxodyne Chemical characters (13 members)
- Acadia (3 members)
- Acadia characters (13 members)
- Achievement and trophy images (5 members)
- Achievements and trophies (7 members)
- Active projects (9 members)
- Actor characters (2 members)
- Actors (2 members)
- Adams Air Force Base (5 members)
- Adams Air Force Base characters (10 members)
- Add-ons (7 members)
- Adytum characters (10 members)
- Aerotech Office Park (5 members)
- Aerotech Office Park characters (7 members)
- Agatha's Station song videos (6 members)
- Agatha's Station songs (9 members)
- Airports (9 members)
- Alcohol (108 members)
- Alien characters (4 members)
- Alien consumables (3 members)
- Alien robots (6 members)
- Alien technology (14 members)
- Alien weapons (27 members)
- Aliens (14 members)
- All Roads (8 members)
- All Roads artists (2 members)
- All Roads authors (2 members)
- All Roads characters (2 members)
- All Roads factions (2 members)
- All Roads human characters (7 members)
- All Roads images (29 members)
- All Roads locations (9 members)
- All Roads mentioned-only locations (14 members)
- All Roads news (5 members)
- America's Playground (13 members)
- America's Playground achievement and trophy images (3 members)
- America's Playground achievements and trophies (4 members)
- America's Playground armor and clothing (25 members)
- America's Playground armor and clothing images (9 members)
- America's Playground audio dialogues (369 members)
- America's Playground audio holotapes (1 member)
- America's Playground character images (93 members)
- America's Playground characters (11 members)
- America's Playground characters by faction (3 members)
- America's Playground characters by location (4 members)
- America's Playground creature images (15 members)
- America's Playground creatures (4 members)
- America's Playground dialogue files (36 members)
- America's Playground ghoul characters (3 members)
- America's Playground holotapes (7 members)
- America's Playground human characters (42 members)
- America's Playground images (10 members)
- America's Playground item images (4 members)
- America's Playground items (6 members)
- America's Playground location images (116 members)
- America's Playground locations (8 members)
- America's Playground mentioned-only characters (6 members)
- America's Playground mentioned-only content (2 members)
- America's Playground mentioned-only locations (1 member)
- America's Playground note images (29 members)
- America's Playground notes (45 members)
- America's Playground plans (152 members)
- America's Playground quest images (13 members)
- America's Playground quests (11 members)
- America's Playground robots and computers (2 members)
- America's Playground source texts (4 members)
- America's Playground terminal entries (4 members)
- America's Playground voice actors (15 members)