Learn how to complete the Easter Egg for the Zombies in Spaceland mode in Call of Duty: Infinite Warfare, defeat the alien boss, and unlock the Sooooul Key trophy!

Just like past Zombies maps, Zombies in Spaceland in Call of Duty: Infinite Warfare is host to an elaborate Easter Egg that players can complete for in-game rewards as well as an achievement/trophy. Completing the Easter Egg is no easy task, but we've boiled it down to a step-by-step process to make it a little less stressful.

Something to keep in mind is that this Easter Egg in Call of Duty: Infinite Warfare is actually easier to complete solo than it is in co-op. That's not to say it is impossible to complete the Easter Egg with others, but the later steps do become a great deal more difficult.

Before attempting the Easter Egg, players will want to make sure that the power has been restored to the entire park. Each area of the park, except for Cosmic Way, will have a power generator to switch on. Once the power has been fully restored, players can begin the Easter Egg proper.

1. Pack-A-Punch

The first step to completing the Zombies in Spaceland Easter Egg is going through all the teleportation portals dotted around the map. There's one in Polar Peak, another at Star Mission near the bumper cars, a third in the Kepler System, and a fourth at the Astrocade. Each portal has a control panel right next to it that players can interact with once the power has been restored. Use the panels to switch on the portals then go through.

Do this at each of the four portals. Lights above the large portal machine - aka the Black Hole Gateway - will light up. When this happens, players can use the portal to visit the pack-a-punch room. Not only is this room useful for upgrading weapons at $5,000 a pop, but it's necessary for players to visit it before they can move on to the next step of the Easter Egg.

2. SETI-COM

Players will then need to construct the SETI-COM and deliver it to DJ David Hasselhoff. The SETI-COM is comprised of three parts:  a boombox, a calculator, and an umbrella. There seems to be three different locations that each part can spawn in any given round, but it's possible that there are more spawning locations that haven't been discovered yet.

The boombox can be found behind the yellow popcorn cart on the lower bridge connected to the spawn, in the basement next to the coffee machine, and at the Moonlight Cafe in the Kepler System. The calculator can be found on one of the benches in Cosmic Way, in a trashcan in the Astrocade, and on a table right next to the Chromosphere trap in the Kepler System.

The umbrella can be found in Cosmic Way, on a bench next to the slides, and it can also be found in Polar Peak on the gift shop counter. If it's in neither of those locations, then check for the umbrella next to the rocket ship in the Star Mission area. Once all the pieces of the SETI-COM have been found, the next step is delivering them to DJ David Hasselhoff, who can be found in one of three DJ booths located around the park:  Polar Peak, Journey into Space, and the Kepler System.

Hasselhoff will give players a complete SETI-COM device. The next step is to advance to the next round, and then walk around the theme park until the screen shakes. It appears as though the areas where this occurs is random each round, so either lead a train or make a crawler to explore a bit and find the correct area.

Upon finding an area where the screen shakes, place the SETI-COM device on the ground and defend it from the onslaught of zombies that appear. Once the timer runs out, pick the SETI-COM back up, advance to the next round, and find the next area where the screen shakes. Fight off the zombies, pick it up, and repeat the process a third and final time. Take the SETI-COM to David Hasselhoff and play through a few more rounds until he appears in his DJ booth again.

3. Crafting A Wonder Weapon

While waiting for David Hasselhoff to return, players should focus on crafting a Wonder Weapon. Like in past Zombies maps, Wonder Weapons are the most powerful weapons obtainable. By far the easiest Wonder Weapon to craft in Zombies in Spaceland is the Shredder, so we will explain how to go about crafting that particular weapon. The first step to obtaining the Shredder is getting the toy gun from a souvenir machine, which players get in exchange for three red coins.

The next step is to keep fighting zombies until the glasses drop. These drop multiple times throughout a game, and once acquired, can be used to turn the entire screen black and white. Equip the glasses to spot the invisible boat located between the Kepler System and Polar Peak, then shoot its battery to dislodge it. The battery will then pop up through one of the water fountains dotted throughout the map, so keep checking them until the battery is found.

Players will now have the first two parts needed to craft the Shredder. The final part needed is the Stone, and obtaining it is a little more complicated. First, players need to amass 300 tickets and use those tickets to purchase the golden teeth at the Astrocade. They will then need to visit the pack-a-punch room again, interact with the purple jar to spawn UFOs, and then keep going through waves of zombies until a brute spawns.

Once a brute spawns, lure it to the crocodile trap in the Kepler System. Use the trap to crush the brute and the trap's teeth in the process. Replace the broken teeth with the golden teeth, then purchase an Arcane Core for 300 tickets. The best way to get tickets fast is by completing N3IL's challenges, so keep that in mind.

Return to the Kepler System and kill zombies using the Chromosphere trap until the UFO attached to the trap departs. After that, follow the UFO, killing zombies around it to fuel it until it transforms into a ball of energy. Collect the energy using the Arcane Core. Use the Arcane Core to transform a gun into an energy weapon, and then shoot the machine inside the crocodile trap's mouth. Avoid being crushed, and then collect the stone from the machine. Deliver all the parts to the Shredder alien cutout located in the underground tunnel system beneath the park to create the Wonder Weapon.

Head to Page 2 for the Final Zombieland Easter Egg Steps!

4. Alien Boss Fight

David Hasselhoff will gift players with some speakers that can be placed on the golden plates dotted around the main teleporter in Cosmic Way. Players need to place each speaker down, and then interact with them to figure out which one has the lowest tone. From there, determine which one has the second lowest tone, and so forth, until players are able to hit each speaker in order from lowest tone to highest tone.

This will cause a UFO to show up, which will then start emitting different colored lights. This is essentially a game of Simon Says - kind of like on the Der Eisendrache map - so quickly take note of the order of the light sequence. Then interact with the speakers, which are now color-coded, in the correct order. This is where playing in co-op is actually more difficult than playing in solo because all players in the game have to interact with the final speaker light in order to progress to the next round of Simon Says.

Complete Simon Says three times to summon a wave of clown zombies, and then the actual alien itself. Keep in mind that failing at Simon Says spawns a brute, which will make completing the Easter Egg measurably more frustrating.

With Simon Says complete, the alien itself will spawn, fitting well with the far future, science-fiction setting of the campaign and multiplayer. It can shoot a blast of blue energy at the player, and also has a tendency to teleport around the map at random in an attempt to get close and dish out a melee attack. It will also spawn zombies nonstop, though killing the zombies it has spawned will force it to pause momentarily and spawn more, leaving itself wide open to additional attacks. Basically, the goal here is to relentlessly shoot the alien's head as much as possible, and we highly recommend staying in Cosmic Way and the beginning area of the game while fighting the alien.

When enough damage has been done, the alien will fall to the ground. Run over to it and melee its back to steal one of its fuses. When that's done, the fight will resume like normal. Keep fighting the alien until it drops again, then melee the other fuse from its back. Finally, just keep shooting it for a third time until it is dead. The alien fuses will appear at the foot of the Cosmic Way portal, so pick them up, head through, and use them to power up the pack-a-punch machine.

5. UFO Battle

Upon exiting the pack-a-punch machine, the UFO will appear in the sky and start shooting balls of electricity at the player. Run around to avoid the electricity, but also be mindful of the zombies that are there as well. Using one of the crafted Wonder Weapons, shoot the blue lights on the back of the Cosmic Way sign (the arch that goes over the bridge) until they turn orange.

When all the blue lights turn orange, a beam will fire from the pack-a-punch portal. Repeat this process until the UFO is completely destroyed, and it will drop a piece of the soul key. Collect it to unlock the Sooooul Key achievement/trophy. Congratulations - Easter Egg complete!

With the Sooooul Key achievement/trophy unlocked and the Easter Egg conquered, players have completed one of the greatest challenges in Call of Duty: Infinite Warfare. If the Infinite Warfare season pass brings on even more Zombies maps, though, players should prepare for even tougher Easter Eggs to complete in the future.

Call of Duty: Infinite Warfare is available now for PC, PS4, and Xbox One.