The monster will try to attack the closest player of it's position. If 2 or more players are at the same distance, it will choose the player with the lowest ID

The monster mentality is very simple. They simple draw a straight line towards the selected player and follow it until they reach him or encounter an obstacle that makes it impossible for them to move

the monsters are most deadly when in hordes. When they appear in more than two touching rows, you will need to find some way to either lower the amount of rows, or find a secure area to kill them from. If they are coming in a straight line, you should be able to kill them at a right angle.

The monsters are affected by every obstacle except the Hot tiles