This is great when your defending in multiplayer and you have a hidden hostage!
STEP 1:You need the characters Mute, Castle, Smoke and any other character that has remote controled defenses or traps such as Nitros or anything that can explode and kill a enemy.
STEP 2.If you have a hidden hostage have Mute, Castle and Smoke go into a empty room such as a example if you have the hostage in the kitchen on House you can set up there but they mostly expect it to be in the bedroom and workshop so set up in the workshop. This includes reinforcing walls and making sure no one can get in for instance put barbed wire down.