The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Yulin System (12 members)
- Yā'mon System (6 members)
- Zenith Sniper Rifle images (2 members)
- Zeus (armor set) set (3 members)
- Zeus Exploration Suit Backpack images (3 members)
- Zeus Exploration Suit Helmet images (11 members)
- Zeus Exploration Suit images (8 members)
- Zeus Images (1 member)
- Zeus MkII series (3 members)
- Zh (0 members)
- Zh-1 (0 members)
- Zh-Hant (0 members)
- Zh-Hant-N (0 members)
- Zh-N (0 members)
- Zh-TW (0 members)
- Zh-TW-N (0 members)