The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Documentation header templates (5 members)
- Documentation see also templates (4 members)
- Documentation shared content templates (2 members)
- Doom Powers (1 member)
- Downloadable content (1 member)
- Dr. Robotnik's Mean Bean Machine (1 member)
- Dreamcast games (1 member)
- E-100 Series (1 member)
- Echidnas (1 member)
- Egg Mobiles (1 member)
- Eggman's bases (3 members)
- Eggman's creations (2 members)
- Eggman's creations (IDW) (1 member)
- Eggman Empire (1 member)
- Emeralds (2 members)
- Error-message templates (1 member)
- Example-formatting templates (7 members)
- Exclude in print (1 member)
- Family of Doctor Eggman (1 member)
- Featured Article (33 members)
- Females (5 members)
- Fighting games (2 members)
- Final stages (1 member)
- Flag templates (3 members)
- Fly types (2 members)
- Foxes (1 member)
- Future (1 member)
- G.U.N. (2 members)
- Gallery templates (1 member)
- Game Boy Advance games (1 member)
- Game characters (2 members)
- Game navboxes (17 members)
- Game templates (2 members)
- Game writers (2 members)
- Games developed by Aspect (1 member)
- Games developed by Dimps (4 members)
- Games developed by Hardlight (3 members)
- Games developed by Headcannon (3 members)
- Games developed by Sega Studio USA (5 members)
- Games developed by Sonic Team (21 members)
- Games developed by Sumo Digital (3 members)
- Games developed by the Sega Technical Institute (1 member)
- Games written by Ian Flynn (5 members)
- Games written by Ken Pontac and Warren Graff (5 members)
- Games written by Shiro Maekawa (4 members)
- Gerald's creations (1 member)
- Groups (3 members)
- HTML typing-aid templates (1 member)
- Handheld platforms (9 members)
- Hatnote modules (3 members)