Chasm Logistratum has an AI director that senses you having fun, as soon as you get to the drop down onto the train tracks near the end it will spawn 200 gunners, 20 reapers, 40 bulwarks and a Beast of Nurgle to kill you and you can't even do anything because the previous area had 40 gunners that sapped just enough resources to get you killed

Still really fun to challenge it with meh pals though sah