The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- On Locke (1 member)
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- On Lyria (15 members)
- On Magda (2 members)
- On Mars (2 members)
- On Noble (1 member)
- On Rytif (1 member)
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- On Selene (1 member)
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- On Spider (1 member)
- On Tangaroa (1 member)
- On Terra (planet) (3 members)
- On The Run (0 members)
- On Tyrol V (1 member)
- On Vosca (1 member)
- On Wala (8 members)
- On Xi (1 member)
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- On Yela (14 members)
- On microTech (planet) (24 members)
- One-off (0 members)
- One Meal Nutrition Bar images (4 members)
- OpalSky (10 members)
- Operation Solace Characters (1 member)
- Optics attachments (23 members)
- Oracle Helmet images (1 member)
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- Orbits Arial (1 member)
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