The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Potentially illegible navboxes (0 members)
- Pouches (12 members)
- Programming typing-aid templates (5 members)
- Promos (8 members)
- Rating templates (1 member)
- Recycled backdrops (19 members)
- Redirect formatting templates (1 member)
- Redirect templates (1 member)
- Redirects with short description (0 members)
- Reference images (2 members)
- Reference list templates (2 members)
- Related-topic templates (1 member)
- Remedy Entertainment (18 members)
- Resizing templates (2 members)
- Resolution templates (1 member)
- Revolution Roulette Merchandise (0 members)
- Revolution Roulette merchandise (3 members)
- Section and anchor link formatting templates (1 member)
- Semantic markup templates (15 members)
- Set index article templates (0 members)
- Short description is different from Wikidata (0 members)
- Short description matches Wikidata (0 members)
- Short description related modules (1 member)
- Short description with empty Wikidata description (0 members)
- Shortcut templates (2 members)
- Sidebar metatemplates (3 members)
- Sidebars with styles needing conversion (1 member)
- Signs of Life Merchandise (0 members)
- Signs of Life merchandise (4 members)
- Single art (61 members)
- Singles (30 members)
- Site functionality (3 members)
- Software templates (1 member)
- Song articles needing single infobox conversion (0 members)
- Song articles with both composer and songwriter (0 members)
- Song articles with both lyricist and songwriter (0 members)
- Song articles with lyricist but not composer (0 members)
- Song articles with missing songwriters (138 members)
- Songs (128 members)
- Sorting templates (1 member)
- String manipulation templates (10 members)
- Stub message templates (2 members)
- Stub message templates needing attention (0 members)
- Stub message templates with documentation subpages (1 member)
- Stubs (143 members)
- Studio albums (9 members)
- Stupido merchandise (0 members)
- T-Shirts (63 members)
- Table templates (1 member)
- Talk header templates (1 member)