The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Achievements (378 members)
- Additional Tasks (120 members)
- Adepts (28 members)
- Administration of this site (8 members)
- Adversaries (15 members)
- Adversaries (Mass Effect 2) (21 members)
- Adversaries (Mass Effect 3) (18 members)
- Alliance News Network (12 members)
- Allies and Relationships (64 members)
- Ammunition (7 members)
- Andromeda Initiative (247 members)
- Angara (253 members)
- Angaran Resistance (31 members)
- Annihilation (41 members)
- Anomaly (37 members)
- Apps (13 members)
- Archives (99 members)
- Armor (585 members)
- Article management templates (47 members)
- Article stubs (134 members)
- Articles needing citations (8 members)
- Articles needing cleanup (11 members)
- Articles needing confirmation (1 member)
- Articles needing screenshots (72 members)
- Artificial Intelligence (64 members)
- Asari (523 members)
- Ascension (46 members)
- Assault Rifles (141 members)
- Assignment Locations (449 members)
- Assignments (387 members)
- Asteroids (42 members)
- Augmentations (141 members)
- Aya (118 members)
- Background (354 members)
- Batarians (153 members)
- Battlemasters (16 members)
- Biotics (389 members)
- Blasto: Eternity is Forever (13 members)
- Blog posts (1,709 members)
- Blood Pack (39 members)
- Blue Suns (75 members)
- Books (37 members)
- Browse (0 members)
- C-Sec (28 members)
- CAT6 (33 members)
- CC-BY-SA files (10 members)
- CC-BY files (5 members)
- CC-SA files (1 member)
- Caleston (26 members)
- Candidates for an overhaul (23 members)