I'm ass/U/mine-ing that a tied roll goes to the rats? After all, how can you beat a dice room with a 6?Also, What's the difference between a Swarm Roll and "making a roll". You reduce obstacles always, but then roll on the next table after. "When a Rat takes an action", Like what? It is the only way to remove a threat, I get that. But do you always remove obstacles when you roll over the room number?.
If a room has too many threats (and after a string of 6's, I started rolling badly and ended up with 2 threats in a room). So; Can you leave or retreat from a room ( I hope!)? If so, please tell me the threat goes away!