Before heading back to the Safe House, reenter the security room and collect a magazine from the counter near one of the dead guards. The magazine, Rescue, gives Chuck 25 per cent more PP from survivor-related activities.
By keeping this on hand for the entire adventure, Chuck will level up much faster.
Nab a coffee creamer from a counter near the Rescue magazine if you wish, and if you’re in need of a good combo weapon, build a pole weapon by merging the machete in the nearby maintenance room with the push broom that stands against the wall just outside the door.