THE FINAL REICH

Hold interact on each of the 3 pressure valves until the dial reaches 60 and turns green. Releasing early resets it.

1. Village Square — behind the Armour station
2. Bunker entrance — left of the main door
3. Riverside — near the Pub entrance

Return to the circular device in the Village Square and interact with the Pilot Light. Kill the Pest Zombies that emerge, then drop into the hole.

Follow the underground path and interact with the generator at the top of the slope to restore power and open the Bunker door.

Open the Bunker door and purchase access to both the Laboratory and the Morgue.

Activate both power switches within approximately one minute of each other — the first resets if too much time passes.

• Laboratory — upper level, rear of the room
• Morgue — near the STG-44 wall buy

Return to the Command Room and open the Salt Mine door. Proceed into the Emperor's Chamber.

Hold interact on the crank in the centre of the Command Room until it stops.

In the Emperor's Chamber, interact with the Hilt machine and kill zombies in the circle until the Geistkraft Transfer Device rises.

Press the large red button on the upper platform. Follow the device into the Laboratory, killing zombies in each red circle. Collect the first Tesla Gun part.

Follow the device into the Morgue and collect the second part.

A Brenner will spawn — shoot its fuel tanks, kill it, pick up its severed head. Required later.

Place both parts into the Weapon Forge and collect the Tesla Gun. In co-op every player must collect one before proceeding.

Interact with the Power Grid machine behind the Weapon Forge. Note the four numbered columns (Rot=Red, Grün=Green, Blau=Blue). Write them in order. Changes each match.

Visit all 4 power boxes under a time limit and set each to the matching colour. Return to the Power Grid to restart if it expires.

1. Command Room — right of the Power Grid
2. Sewers — fire-trap side of Pack-a-Punch
3. Sewers — opposite end near Riverside passage
4. Pub — beside the door toward the Tower

At the Tower, interact with the central lever and defend it until the Lightning Rod fully rises.

Activate and defend the levers on the front-left and front-right supports until complete.

Return to the Emperor's Chamber and interact with the Right Hand of God (left side facing Barbarossa). The Zeppelin appears.

Shoot one of the four lights on the underside of the Zeppelin until a generator falls. Note where it lands.

Kill zombies near the fallen generator until it charges and releases a battery.

Carry the battery to the Left Hand of God in the Emperor's Chamber (right side facing Barbarossa). The carrier moves slowly and cannot fire.

Repeat three times total. On the third cycle the Zeppelin may pull a generator back — shoot it again. Interact with the Left Hand of God once all three are delivered.

Equip the Brenner Head and aim at each of the four paintings to reveal a bird symbol and Roman numeral. Note which numeral belongs to which bird — tip: name birds by the direction they face.

1. Pub — upstairs beside the Gramophone
2. Courtyard — inside the S-Mine trap area
3. Sewers — right of the door to Riverside
4. Morgue — inside the Spike Trap room

At the Voice of God machine in the Emperor's Chamber, set each pillar to the Roman numeral matching its bird symbol. Press the red button.

Shoot the energy field around the Hilt with the Tesla Gun, then interact to begin the boss fight.

The Panzermörder cannot be killed normally — use weapons to stun it. Repeat three times:

1. Shoot a Zeppelin generator until it falls
2. Kill zombies near it to charge it — collect the battery
3. Shoot the boss until it kneels
4. Interact with the stunned boss to attach the battery

After three batteries are attached the boss is defeated. Unlocks Fireworks achievement. Does not save Klaus — that requires the Hardcore Easter Egg.