Chapter 34

After the cable snaps, you'll gain the ability to control zombies. Return left to the ladder near the lift. Have your zombies pick you up and throw you to the ladder. Climb up.

Go left to the wheel mechanism. Rotate it clockwise to lower the maintenance lift. Once your zombies are on board, let go to return the lift to its initial position.

Head left past the main elevator to the end to find a giant mine cart.

With your zombies, pull the cart as far right as possible. Look up and right for a dangling rope. Have your zombies throw you to the rope. Climb up and move left to a hole in the ground. Drop onto the cart when it appears below the hole; your zombies will push it back to its original position.

Continue left and climb the wall with hand rungs. Move across the narrow wooden bridge to a platform with a hanging cage containing three zombies.

At the base of the pole by the cage, push a crate aside to reveal a Rocket Box. Pull the cord to activate it. Once it flies up, push the box that was on top of it underneath so the Rocket Box lands on it.

Jump onto the Rocket Box and activate it. As it launches, jump to the handhold on the bottom of the cage to release the zombies.

Return across the bridge and drop to the platform below.

Secret Orb / 'Pack Mentality' Achievement: After rescuing the zombies from the cage, return across the bridge and drop to the platform before the mine cart. At the base of the wall opposite, interact with the boarded-up section to pull off the planks. Enter the gap and climb down the ladder. Proceed left, pull the flaming torch off the pillar. As you move into the cave, Guard Dogs will appear. Keep the torch pointed at them (alternating between front and back) to keep them at bay. At the far end, interact with the Secret Orb to unlock the 'Pack Mentality' achievement.

Return up the ladder and drop down via the mine cart to the main area. You should now have eight zombies following you.

Take the main elevator up to the top floor with your zombies.

Head right to the cliff. Have your zombies pick you up and jump across the gap to the right. Enter the doorway to find a corpse. Drag the body out to the ledge and it will drop. Jump down to the zombies below.

Head back past the main elevator to the left. At the end of the platform, push the large cage off the ledge with your zombies.

Return to the main elevator and ride it down to the central level. Go right and approach the pressure plate to recruit two more zombies (total 10).

Return past the elevator and continue left to the cage you pulled down. Three more zombies will join you.

Head all the way left to the gate. Have your zombies help pull it upwards to open it. One more zombie joins (total 14).

Enter the gate and proceed left. At the end of the platform, have your zombies pick you up and jump to the raised platform on the left with the lever.

Pull the lever to shift the track downwards, allowing the mine cart (filled with zombies) to race down the new slope.

When the mine cart is at the far left, hit the lever to start it moving. When it's halfway between the two square gates in the center, hit the lever again to return the track.