Rimworld has multiple different raids that defeat that defense, though. Drop pods, sieges, sappers, and breachers - most all in both human & mech variants. The

Rimworld has multiple different raids that defeat that defense, though. Drop pods, sieges, sappers, and breachers - most all in both human & mech variants. The open-door killbox is still super strong, but you can't survive with only that defense.