The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Accessory items (118 members)
- Acquired through (1 member)
- Ammunition items (25 members)
- Ancient Avian AI NPCs (1 member)
- Ancient Tome AI NPCs (1 member)
- Angry Nimbus AI NPCs (1 member)
- Antlion AI NPCs (1 member)
- Antlion Charger AI NPCs (1 member)
- Antumbral Skull AI NPCs (1 member)
- Aquatic NPCs (24 members)
- Arcane Codexes (1 member)
- Armor items (38 members)
- Armor sets (33 members)
- Arrows (6 members)
- Arterial Grasper AI NPCs (1 member)
- Artifact weapons (1 member)
- Asteroid Field NPCs (7 members)
- Astral Adventurer AI NPCs (1 member)
- Astral Amalgam AI NPCs (1 member)
- Atlas AI NPCs (1 member)
- Audio files (41 members)
- Axes (5 members)
- Bait items (11 members)
- Banner templates (2 members)
- Bar items (4 members)
- Bat AI NPCs (5 members)
- Beholder AI NPCs (1 member)
- Biome banners (6 members)
- Blizzard NPCs (3 members)
- Bloater AI NPCs (1 member)
- Block items (20 members)
- Blood Gazer AI NPCs (1 member)
- Blood Moon NPCs (6 members)
- Bloomshroom AI NPCs (1 member)
- Blossom Hound AI NPCs (1 member)
- Book items (1 member)
- Boomerangs (3 members)
- Boss NPCs (10 members)
- Boss Summon items (9 members)
- Bound AI NPCs (0 members)
- Bows (36 members)
- Briar NPCs (18 members)
- Buff images (98 members)
- Buffs (1 member)
- Bullets (4 members)
- Bunny AI NPCs (1 member)
- Burrowing Enemy NPCs (3 members)
- Candidates for deletion (203 members)
- Captive Mask AI NPCs (0 members)
- Captive Spirit AI NPCs (0 members)