Fallout Shelter creatures

General information
Creatures will randomly attack the vault in the form of incidents. In the cases of mole rats and radroaches this can also happen after failing a rush. Creatures can also be encountered by vault dwellers while out exploring, but will not physically be seen in the game. Mole rats and Radroaches multiply if there are no targets in the room, or if none enter the room within a short time after they spawn. Molerats' and Radroaches'strength depends on the level of the room in which they spawn. Average dweller level inside that room may also be a factor.

Mammals

 * Mole rat

Reptiles

 * Deathclaw

Arthropods

 * Radroach