The side Easter eggs of Totenreich: Richtofen's Echoes of the Damned, the song No One There, the Viking Helmets, the hidden power-ups, fishing with Olaf's Cod Cranker, Mister Peeks and the six Cursed Relics.
From round 15, and on every round that ends in 0 or 5, hit a barrel in Core Foundry, outside the room with the stairs and the zipline.
The barrel opens: dig inside and pick up the Ritterkreuz, Richtofen’s medal.
The players land in a corridor with the Dreadful Dresden, and pick up intel documents to move on while Richtofen and Dravakar talk.
In the round room at the end, play the radio and its three codes, place the three fragments of Element 115 and the three figurines on the scale (a scene with Wulfrun Von List on the throne follows), and set the sword on the statue.
Smoke leaks under the wooden door. Open it and fight through the burning corridor back to Core Foundry.
Loot falls, Glocke Drop Controllers among it, and every player earns the Domineering Dark Ops calling card.
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No One There
The song of the map plays once three headphones in the colours of Mister Peeks have been found: on boxes near PhD Flopper in the Dry Dock, near Double Tap Root Beer in Core Foundry, and at the bottom of a shelf next to a plate in Loven’s Antiquities.
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Fishing
Olaf’s Cod Cranker
A free fishing rod, found in Blodheim Hall, the Dry Dock, Fishery Island, the Storm Bridge and on Beacon Island. Set it on one of the red holders by the water, wait for the blue glow and pull it out in time.
The catch
Old boots, each one a hostile zombie, Essence, 500 Salvage, support items and scorestreaks, and later the controllers of Tyr.
Golden Tide Helm
Fish often enough and Olaf, Cranker of Cod, a zombie wearing the helmet, appears. Killed, he leaves it: better catches, caught faster. It can be picked up again for free in Blodheim Hall.
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Viking Helmets
Four helmets give a boon to the player who wears them: Cointoss, Goldentide, Icebane and Kneehigh. The Kneehigh Helmet turns its wearer into a gnome for a while, invulnerable and firing a lantern: with the Shadow Rift ammo mod and the Machine Workshop open, shoot the four hidden gnomes (on a bunker roof past Tyr’s Foot, on the shrine table of the Stave Church, on a rail at the top of the lighthouse, and on the top walkway of the Machine Workshop), then take the helmet with a red outline in Loven’s Antiquities. No source checked gives the steps of the three others.
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Hidden power-ups
Miniature power-ups are hidden around the map, free to pick up:
Bonus Points: on a crate behind the fence of Der Wunderfizz, Beacon Island.
Max Ammo: on top of the tall wooden structure facing Juggernog, Fishery Island.
Double Points: on a rock below the left claw of Tyr, best seen from the Storm Bridge.
Full Power: on the stern of the ship, across from Speed Cola, Dry Dock.
Insta-Kill: on a gravestone of the cemetery near the Burial Grounds.
Max Armor: on a basket across from the broken generator in Lief’s Boat Repair.
Nuke: behind the head of the robot in the War Factory.
Fire Sale: next to a wooden chair on the top floor above Loven’s Antiquities, once all the ones above are taken.
Random Perk: on a shelf in the red house right behind the spawn, in Eidskallen Landing, once all the others but the Fire Sale are taken.
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Cursed Relics
In Cursed mode, six side quests and trials unlock the Relics of the map, each one a constraint for later Cursed games. Completing a trial also gives 1,000 XP and, for most of them, a GobbleGum.
Relic
Effect
Unlock
Power Switch
tactical and lethal equipment change every round
Find four wooden totems with deer heads, at Eidskallen Landing, Core Foundry, Tyr’s Foot and the Burial Grounds, then hit the four matching pelts of Blodheim Hall with a Combat Axe, from the totem with the fewest heads to the one with the most. Trial: three waves that only traps can hurt.
Wrestler’s Belt
the wall weapons change every round
Take the Mister Peeks magazine left of the Jotunn Star at the top of the lighthouse, then get 50 kills with each of the 17 wall weapons and with the Jotunn Star. Trial: four waves, the weapons in hand lost at the end of each.
Stuffed Elephant
health takes longer to come back
Reach round 40 without a single perk. Trial: four eggs to find against the clock, each one hiding an HVT.
Dancing Arnie
every perk machine gives a random perk
Cook a stew in the pot of Blodheim Hall: beer, Chilly Chunks, a red lobster from a Necropincer killed by a Flammenfalle Trap and a fish caught in a special round from round 41, then 100 kills with the Jotunn Star. Trial: five waves that only melee can hurt.
Agarthan Device
a different zombie type every round
On Tier II with Richtofen, place a Mister Peeks plushie, a military helmet and a radio on the throne of Echoes of the Damned. Trial: six waves that can only be hurt indoors.
Music Box
enemies only take critical damage
On Tier II, reach round 60 and get five critical kills from the bay window of the head of Tyr. Trial: six waves held in lockdown spots.
Mister Peeks also shows up in Cursed games: shot while he dances, he drops a Lucky Egg of bronze, silver or gold. Two of his spots are in Eidskallen Landing, on a rock between the two bridges to the robot head, and on a finger of the robot hand in the sea past the Mystery Box.