Survive Inside the House

At the beginning of the match, the crew will be trapped inside Samantha and Dr. Monty’s house.

You can spend Essence to open the two blocked entrances, but this is not required. If you continue surviving the opening rounds, the barriers will eventually open automatically.

Saving your Essence here can help you purchase weapons, perks and other equipment later in the match.

Answer the Telephone

After surviving for several rounds, you will hear a telephone ringing downstairs.

Locate the telephone and interact with it to begin a short sequence. The twins will destroy the entrance to the house and create a portal outside.

Enter the portal to travel to the Nexus Forge, which acts as the central hub of Rex Infernus.

Place the World Seed

Once you reach the Nexus Forge, place the World Seed into the pedestal at the centre of the area.

Doing this will activate two cages containing Dread Skulls. Red energy will surround the cages before the skulls are released and begin travelling towards two of the Shadowsmith temples located around the map.

You will need to follow and destroy both Dread Skulls. Placing the World Seed for the first time will award you an intel piece.

Follow and Destroy the First Dread Skull

Choose one of the released Dread Skulls and follow it to its corresponding Shadowsmith temple.

Attack the skull as it travels deeper into the temple. It will periodically summon red-eyed zombies to protect itself, so make sure you have enough ammunition and a reasonably strong weapon before beginning the fight.

Continue damaging the skull until it falls to the ground and explodes.

Its destruction will leave behind a burning cauldron containing a flame.

Carry the Flame to the Nexus Forge

Interact with the cauldron to collect the flame.

While carrying it, your character will be set on fire and will continuously take damage. You can drop the flame by pressing your fire button if you need to recover, defend yourself or clear the zombies blocking your path.

Carry the flame back to the Nexus Forge and melee one of the two unlit cauldrons beside the central platform to deposit it.

Repeat the Process

You must now repeat the same process with the second Dread Skull.

Follow it to another Shadowsmith temple, damage it while dealing with the enemies it summons and collect the flame from the cauldron left behind.

Return the second flame to the Nexus Forge and place it inside the remaining unlit cauldron.

Once both flames have been delivered, the next part of the Pack-a-Punch process will begin.

Turn Both Crank Wheels

Two crank wheels can now be operated near the Nexus Forge platform.

Interact with each wheel and continue turning it until the process is complete. Turning the wheels takes several seconds and leaves you vulnerable to attacking zombies.

If you are playing solo, clear the surrounding area or leave a single zombie alive before attempting this step. In co-op, one player can turn the wheel while the remaining players protect them.

After both wheels have been fully turned, the central platform will lower and reveal the Pack-a-Punch machine.

Be careful around the rotating energy rings surrounding the platform, as touching them can damage you.

Upgrade Your Weapon

The Pack-a-Punch machine is now permanently available for the remainder of the match.

Approach the machine and interact with it to upgrade your currently equipped weapon.

The first Pack-a-Punch upgrade costs 5,000 Essence, with additional upgrades requiring progressively more Essence.