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| Model | Author | Info | |
|---|---|---|---|
| Obiwan | Roadkill | ||
| ODBOD | Unknown | 1 character , 1 skin | |
| Ogre | Unknown | 1 character , 1 skin | |
| Oni Yoroi | Unknown | 14 characters , 14 skins | |
| ONIBanaEASY | Unknown | 4 characters , 20 skins | |
| OOM-B099 | Sergeant Todd | 1 character , 53 skins | |
| Ophelia-Enhanced | Unknown | 1 character , 1 skin | |
| Optimus Prime Comic | Unknown | 1 character , 2 skins | |
| Optimus Prime Comic | Michael Frost | 1 character , 2 skins | |
| OriginalKonoko | Unknown | 1 character , 1 skin | |
| OsamaBinLlama | Unknown | 1 character , 1 skin | |
| oscar | Warbeast | 1 character , 1 skin |