First you have to turn on the Power! This part is pretty straightforward. Just follow the star indicators.

After you can activate Pack-a-Punch. It’s done by activating both buttons in the Particle Accelerator (PA for short) room and going through the portal. then follow the indicator to the marked shortcut and buy it. You’ll be taken to a previously inaccessible little room and in the corner of room lies the part for the Pack-a-Punch. Then go straight to where you used the portal and interact with the machine.

VIDEO GUIDE BY MRDALEKJD

After killing your first Megaton, the last half you kill will drop a yellow keycard. Take it to the weapons lab (the room with Deadshot Daiquiri) and place it in the machine in the corner to the right of the corridor that leads to the PA. Take the remote control and go to spawn. Go through the door to the left of the ammo crate and you’ll find an inaccessible door. There’s a crack in the wall to the right of that little room that you can interact with. Doing so will make the door kill any zombies that pass through it. After killing around 20~30 zombies, the machine will stop and a voice will say that it’s charged. Interact with the crack again and the door will open, revealing a free D.I.E.

VIDEO GUIDE BY MRDALEKJD

After coming back from buildin the PaP, there will be another portal somewhere around the map, shown by an indicator. As soon as you go through it you’ll have to find 3 parts. These are always in the same location but spawn one at a time and in a random order. The locations are:

• In the Pack-a-Punch room near the shortcut.
• In spawn below the stairs between the ammo crate and crafting bench.
• In the crash site (Juggernog area) on top of a piece of the plane.

Be aware the every time you pick up a part, dogs will spawn. After getting all 3 parts, build the aetherscope on the table below the PaP machine and grab it.

You need to complete have a D.I.E., either through step 3 or by other means, to be able to interact with the crates and spawn the portals. In the center medical bay there will now be a machine with four canisters poiting down. You have to shoot each one with the corresponding elemental version of the D.I.E.. Here’s how to get them:

Notes: The parts in bold can be done at any point in the game. These four steps can be done interchangeably and in any order.

Fire:
Next to the crash site shortcut on the ground there’s a small box. Melee or shoot it and it will open revealing a fuse. The box appears at any point in the game as long as the shortcut is accessible. Go to the pond (quick revive area) and you’ll find another portal. Enter it and go to the weapons lab. Directly across from the deadshot daiquiri there will be a machine that you can interact with, turning on a laser that cuts open the crate.Now go back to the pond and in theback of a truck lies the same crate that you can now open, giving you the fire upgrade.

Lightning: Head to the area below PaP and go through the portal. Now you will have to absorb 3 crystals around the map and shoot their energy at a box in the PA room. Make sure your D.I.E. is not full on ammo so it can absorb with the aim button. You have to be in dark aether to absorb the crystals, and you can only carry one at a time, but you can fire the energy while in the normal world. Also, stand very colse to the box when firing or it may not register. Locations:

• Located through a hole in the roof in the bedroom, near stamin-up;
• At the crash site, between juggernog ant the entrance to the cave;
• At the pond to the right of the mystery box;

If you don’t fully complete all 3 crystals in a sinlge portle run, the portal will respawn next round and you can finish the remaining ones. After getting all crystals you can open the crate.

Cryo:
After turning on the power, a passage will open directly from the pond to the crash site. there you’ll find a tree with fungus coming out of it. Have a Megaton shoot the fungus and it will start dripping a liquid. Now go to the top of the penthouse in Nacht (the building right after spawn) and shoot the box facing towards the pond with the D.I.E.. Go towards the pond and grab the vial where the box fell. Place it at the fungus and wait for it to fill up. Now grab it and use it to open the crate in the medical bay.

Nova-5:
Go to the Mezzanine in Nacht and you’ll notice a canister in an inaccessible place. Suck it with the D.I.E. and pick it up. Now go to the weapons lab and place it in the device at the corner to the right of deadshot. Kill a dog beside it, making it explode near the canister and filling it up. Don’t risk this step in normal rounds. Wait for a dog round instead. Pick up the filled vial and place it on the crate at the crash sitethen melee the canister and open the crate.

UPDATE: You can kill the dog by the device even before getting the canister and it will count, you just gotta put the canister there later. Recommended to do during step 4 since you can spawn dogs on command.

After shooting all the canisters with the corresponding element, there will be a new portal between the medical bay and the PA. Enter it and interact with the anomaly on the platform directly above speed cola. Wait until you get back to the normal world and get the Dark Aether Wrench that’s now sitting there. Go back to spawn and interact with each corner of the tank then kill the zombie that pops up from the lid. Stick a semtex on the lid and after exploding, the tank will shoot. Now go to the crash site and grab the golden ball. Some dogs will spawn. You can drop the ball to kill the dogs then pick it back up. Take the ball to the place you found the anomaly and place it in the slot on the wall.

Get a Megaton to spawn and split it in two. Now get them to the medical bay directly below the machine and they will be sucked in. Then interact with the computer and watch the cutscene (if you’re playing coop, all players need to be in the computer room). As soon as the custscene ends, dogs and megaton zombies will spawn, and another round will begin.

Exit through the right door and rush out to the open, so you can safely dispose of them.

Follow the star indicator in your minimap and enter the portal. Interact with the anomaly in front of the desk next to spawn and watch the cutscene. After it ends, there will be a photo on the desk.

DO NOT PICK IT UP YET, as it will commence the boss fight.

This step is much simpler than it seems at first glance.

Grab the photo and you’ll be taken to the PA room. Wait for the dialogue to end and survive 3 waves of zombies in there. It’s that simple. You don’t have to worry about protecting the scientist, as he is immortal, but zombies will be attracted to him and you’ll have to kill them too for the next wave to spawn.

The strategy is to ignore the scientist and take your time safely clearing the wave, then kill the zombies surrounding him and he’ll move to the next location, prompting the next wave. Use equipment and the sentry when needed, but hold your Aether Shroud to the end of if you absolutely had to use it, try to charge it again before the end of the final wave.

As soon as you finish the third wave, go up from the Pack-a-Punch to the right door leading to spawn (the one across from the Elemental Pop perk, not the one to the left of it) it will be blocked by a barrier while the dialogue is playing. Hug the rightmost part of the barrier and be ready to run through it as soon as it opens to rush to the exfil at the pond. As soon as it opens, there will be tons of lightning raining down at specific locations, closing routes to the pond, and zombies spawning.

ATTENTION WHEN YOU WALK IN A LIGHTNING YOU WILL DIE INSTANT!

You don’t need to kill any zombies, just reach the exfil in time.

Aether Shroud is your best friend here. This is the route to the pond:

• Squeeze through the right side where the barrier was (there’s lightning there but you can get through it from the right) and go to spawn.

• Go through the door to the right of the crafting table and up the stairs to the stamin-up room, turn left and go up the rubble to the penthouse.

• Go out to the crash site from the penthouse exit and make your way to the pond. Get to the chopper and interact with it to exfil.

Thanks to MrDalekJD for let us using his Video Guide.

Credits to Jvict on Reddit for his Step by Step Guide in Textform!