Pack-A-Punch is added to the map for the first time in the room with the power switch, the Pack-A-Punch also has a different mechanic compared to the original one.
Pack-A-Punch allows players to upgrade their primary weapon for a total of three times. Each upgrade consumes one more battery, with the first upgrade requiring two batteries. The primary weapon upgraded will receive a 25, 50 and 75% damage increase over the course of three upgrades. Only primary weapons are able to be Pack-A-Punched.
At the final round, a portal will appear and a countdown to its opening starts for four minutes. After four minutes, the portal will open and become available for players to escape by jumping into it. The portal only stays open for one minute.