Note: I am just collecting stuff here, this hasn't been reviewed by Headmins yet.
Concerning Antagonists
Colossus
- Playing a friendly colossus is not allowed. [ Link ]
Concerning Gameplay
General
- Felinids and other species that can enter duffel bags may not abuse this mechanic to avoid being damaged by Zombies. [ Link ]
Engineering
- GarTEGs and other constructions that abuse game implementation details to produce something in vast quantities. [ Link ]
- Rule of thumb: The things you construct should make sense and not recklessly expose other crew to danger from an IC perspective.