The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Achievement icon (64 members)
- Achievements (1 member)
- Arena background images (25 members)
- Banners (34 members)
- Candidates for deletion (1 member)
- Candidates for speedy deletion (0 members)
- Card images (15 members)
- Characters (3 members)
- Citation needed (0 members)
- Cleanup (0 members)
- Community (4 members)
- Copyright templates (12 members)
- Defense Formations (5 members)
- Developer (0 members)
- Developers (2 members)
- Dirty Tricks (22 members)
- Dirty Tricks Formations (3 members)
- Dirty tricks (1 member)
- Dirty tricks icons (22 members)
- Disambiguations (0 members)
- Documentation templates (53 members)
- Dynasty (3 members)
- Formation images (275 members)
- Formations (3 members)
- Formatting templates (22 members)
- Front page sections (6 members)
- Game info (8 members)
- Hidden categories (0 members)
- Images (13 members)
- Images needing improvement (0 members)
- Infobox templates (3 members)
- Infoboxes lacking images (0 members)
- Legal notices (3 members)
- MFL All-Stars (80 members)
- Main page team logos (36 members)
- Maintenance (0 members)
- Media (2 members)
- Mutant Football (13 members)
- Mutant Football Wiki (7 members)
- Navigation templates (7 members)
- Notice templates (15 members)
- Offense Formations (9 members)
- Pages to be merged (0 members)
- Pages to be moved (0 members)
- Pages using duplicate arguments in template calls (2 members)
- Pages with broken file links (0 members)
- Player images (53 members)
- Races (7 members)
- Rules (3 members)
- Stubs (149 members)