Rat

A rat is an enemy from the quarry of blades, although from what has been seen so far, the rats are non-aggressive. Rats might be native to other locations as well, which has not been confirmed.

So far the types of rat seen (and confirmed Canon) are:

RAT_MINER
RAT_PRISONER

So far the types of rat not confirmed to be canon, but theorized to exist are:

RAT_OVERSEER
RAT_NOBLE
RAT_BERSERKER
FIRE_RAT
ASH_RAT
RAT-LE BONES

Equipment only availible with the aid of Rats working in the mechanofortress is:

RAT-LING GUN (unconfirmed)