Rimworld : Killbox guide and defensive design : Tutorial Nugget

Killboxes love them or hate them are a very effective means of demolishing large opposing raids. In this tutorial we cover the three main rules of designing them, maximise cover for your pawns, removing cover for your enemies and bringing enough damage to bear to destroy enemies as they enter. You are also going to want a long snaking entry corridor to break up large clumps of enemies so they can only enter one at a time. Testing map save if you want to run some of your own testing