1. ZIP LINE CRANKS
First you will need to unlock regular Pack a Punch, you can find the post here. After unlocking Pack a Punch you will need to locate 2 zip line cranks. One is located at the Stern, place it at the top of the boat Sun Deck and crank it until it is in position. The next crank is located at Forecastle after obtaining the crank place it at the Main Deck and crank it until it is finished.
2. ZIP LINE HANDLE
Make your way back to the top of the lighthouse and obtain the zip line handle from hermit. After retrieving the zip line handle you now want to make your way to the zip line you didn’t have access to before at the top of the house.
3. POWER SWITCH
Make your way to the top of the lighthouse and zip line to the Facility Entrance. After zip lining to new area make your way to the Human Infusion locate and turn on the power switch.
Now that all three power switches are on a flinger on the sun deck now has enough power to work. Make your way there and use the flinger to access the Iceberg location and Golden Pack a Punch. You can now use the Golden Pack a Punch which allows you to Pack a Punch for 5000 points but Pack a Punches the weapon 4 times, thats right 4 times!