DRW Maintenance Tunnels

The Maintenance Tunnels have the highest concentration of zombies in the entire mall. It has two unique vehicles: the delivery truck, and the sedan. It is commonly used as a way to rack up kills for the Zombie Genocide achievement. This is also the location where you must fight Carlito the final time. In this area, Carlito plans to use explosives he has stored in trucks to blow up the mall. To get to the tunnels, you must either enter through the park or through several doors throughout the mall. You can only get through these doors after you find the Maintenance Tunnel Key.