http://www.newsweek.com/call-duty-black-ops-4-zombies-voyage-despair-easter-egg-guide-walkthrough-1175366

Call of Duty: Black Ops 4 fans NoahJ456, SmartGuy316 and Beebat were the first to solve the Voyage of Despair Easter egg. With their help, here’s a full guide and walkthrough for each of the steps.

The very first step to unlocking Pack-a-Punch is opening up the whole map and eventually gain access to the Poop Deck. Atop its central steering wheel, you’ll see a glowing symbol called the Sentinel Artifact. Grab it, making alterations to the map and spawning a few portals.