The medieval tunnel to the  barbican, renamed the Spur, was transformed by incorporating all sorts of  tricks and traps including remotely-closing doors and falling doors so that the enemy  could be trapped if they managed to break in.

通往碉堡的中世纪隧道被重新命名为“Spur”，里面加入了各种各样的诡计和陷阱，包括遥控关闭的门和落下的门，这样如果敌人设法闯入，他们就会被困住。