In Call of Duty: Modern Warfare 4's DMZ mode, the Counting Room Vault Key is a reward for completing the "Operation Silent Ledger" story mission. This key unlocks a specific door within the Heavenly Luck casino, situated in Cheongun Village, which often contains valuable loot.
Locating the Counting Room Vault
Entering the casino through its main entrance, which is typically heavily guarded, players should immediately turn right. Proceed through this door into a winding corridor. Look for a room ahead with three large windows and a door beside it. Continue down this corridor until you reach a double wooden door, which leads to a security room. Follow the corridor beyond this room to its end, where you will find the locked door requiring the Counting Room Vault Key.
Alternatively, players can enter the casino from the rear, which usually has fewer enemies. This entrance leads directly onto the casino floor amidst the slot machines. Clear any hostiles in this large open area, then cross to the southern side to find a doorway. This passage will guide you to the main entrance hall.
For those replaying "Operation Silent Ledger" to spawn closer to the casino, aim for the first main objective marker inside the building. The vault's location can also be referenced as being on the floor above the Aston Martin Dreadnought.
Once inside the room with the safes, players will find two safes and loose cash on the shelves, offering a good opportunity for looting before extracting.
