The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- ATGC (1 member)
- Achievement/Trophy images (13 members)
- Admins (1 member)
- Afghanistan (17 members)
- Afghans (1 member)
- Airborne equipment (2 members)
- Aircraft (30 members)
- Americans (134 members)
- Ammunition (12 members)
- Amputees (34 members)
- Angola-Zaire border region (13 members)
- Animal Characters (12 members)
- Animal characters (0 members)
- Animals�� (25 members)
- Anniversaries (5 members)
- Antagonists (89 members)
- Anti-tank rifles (2 members)
- ArmsTech (6 members)
- Article management templates (18 members)
- Articles to be merged (1 member)
- Articles to be split (1 member)
- Artificial intelligence (40 members)
- Artwork Images (11 members)
- Asian Countries (5 members)
- Assault rifles (21 members)
- Audio players (3 members)
- Battle Cry (1 member)
- Battle rifles (3 members)
- Big Bosses (4 members)
- BlogListingPage (0 members)
- Blog posts (198 members)
- Body armor (5 members)
- Bosses in Ghost Babel (6 members)
- Bosses in Metal Gear (13 members)
- Bosses in Metal Gear 2 (11 members)
- Bosses in Metal Gear Acid (5 members)
- Bosses in Metal Gear Acid 2 (7 members)
- Bosses in Metal Gear Solid (11 members)
- Bosses in Metal Gear Solid 2 (12 members)
- Bosses in Metal Gear Solid 3 (10 members)
- Bosses in Metal Gear Solid 4 (9 members)
- Bosses in Metal Gear Solid V (10 members)
- Bosses in Metal Gear Survive (4 members)
- Bosses in Peace Walker (14 members)
- Bosses in Portable Ops (5 members)
- Bosses in Revengeance (12 members)
- Bosses in Snake's Revenge (5 members)
- Breathing apparatus (2 members)
- British people (0 members)
- Britons (11 members)