The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- X1 Velocity images (2 members)
- X1 images (19 members)
- X1 series (4 members)
- Xanthule (armor set) set (2 members)
- Xanthule Helmet images (8 members)
- Xanthule Suit images (8 members)
- XenoThreat images (1 member)
- Xenosystems (1 member)
- Xi (1 member)
- Xi'An Characters (1 member)
- Xi'An Faction Characters (0 members)
- Xi'An Systems (0 members)
- Xi'an (1 member)
- Xi'an Characters (6 members)
- Xi'an Empire (3 members)
- Xi'an Faction Characters (5 members)
- Xi'an Systems (18 members)
- Xi'an companies (6 members)
- Xi'an images (15 members)
- Xi’an (1 member)
- Xi’an Faction Characters (0 members)
- Yar (1 member)
- Yar images (1 member)
- Years (29 members)
- Yela (14 members)
- Yela images (41 members)
- YellowJacket GT-210 Gatling images (1 member)
- Yorm (7 members)
- Yubarev (1 member)
- Yubarev Electron Pistol images (1 member)
- Yubarev Pistol images (11 members)
- Yue (0 members)
- Yue-N (0 members)
- 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)
- Zeus Mk II series (1 member)
- 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)