Oggun
Oki O’Conn
Old Earth
Old Terra
Ol' Willie Pete
Omegas Borg Army
Omegas Clan Faction
Omegas U.N.M.
Omegas Wolves
Omicron Guard, 82nd [RND]
Onslaught
OnyxOpal Dragons
Orcus
Order of the Carmelites
Orester
Osprey, Dr.
Otto Von Bismark
Overlords Clan Faction
Owen Van Doyen