The third level is my typical layout format in the pattern Elevator, 3 slot room, 2 slot non-production room, 3 slot room, Elevator.

Having two elevator lines on the periphery means Molerats will be forced to only invade the bottom level rooms and Deathclaws will only visit a room once, preventing dweller casualties in an attack. This leaves space for another two slot and a three slot room on the level, which are production rooms. This requires me to waste a room slot and build two more elevators to shift the left side elevator line to the periphery and fit a two slot room in between. For faster dweller movement, I like to keep the left side elevator functional, rather than forcing everyone to access the top level only through the right elevator on the second level.

In the second level, I shift the left elevator to the leftmost part of the level.

For greater dweller efficiency, I prefer to keep just 1 guard in each room and have the two manning the door chase the Deathclaws from room to room. When all the rooms are manned with such guards, even Deathclaws barely make it past the first five rooms.

When you have Level 50 Dwellers with 20+ damage Weapons manning the Vault Door, Raiders rarely get through to the second room, and by keeping it a residential room, the production of the other rooms is not halted. The preferred layout is Vault Door, Elevator, Barracks, Power, Food, Water, Barracks, Elevator. It also guards against the bunching up of dwellers, which makes them hard to heal in Fallout Shelter.

The top level consists of single slot rooms since it’s easier to try and heal 2 dwellers instead of four or six.

The core principles behind the design were to build a vault that can withstand Deathclaw attacks and can limit the impact of Molerat attacks. This also means that the Vault design has proven successful enough to meet the challenges of the game when it was started with update 1.2. The Fourth Vault has remained functional to date and thus, can’t quite be termed a failure.

Fallout shelter a cry for help