Rex Infernus: Secrets

The side Easter eggs of Rex Infernus: the songs All We Are and Samantha's Dream, the piano of Her House, the four masks, Mister Peeks' Dance Off, the hidden power-ups and the Super Easter Egg of the Twins.

4 min read
4 chapters
updated 2026-11-09

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Songs

All We Are

The song of Rex Infernus, behind three pairs of headphones in the colours of Mister Peeks: on top of a pillar of the Nyxara Main Chamber, reached by wall-jumping, at a window of Ruinas Insula, and by a skull hidden between a rock and a low wall of Aranea Insula.

Samantha’s Dream

The phonograph of the bedroom above Quick Revive, in Her House, plays it. It is heard only near the phonograph.

The piano of Her House

It plays like the piano of Paradox Junction: seven tunes, one per round. Each pays 300 Essence plus 100 for each right note in a row; the fifth gives an intel the first time, and the seventh 1000 Essence and two power-ups, one this round and one the next.

The four masks

Four masks can be worn in Rex Infernus, all in the same game, and each has a pedestal where it can be set down to swap between them.

Horned Skull Mask

Stay in Her House for nine rounds or more, then hit the painting on the right of the chimney. Hit earlier, the painting gives smaller rewards instead, 600 Essence or ammo after five or six rounds, a perk or a Rare Aether Tool after seven or eight, and the mask no longer comes. Worn, it raises damage and armor while standing still, in a circle that hurts the zombies who step in, once a minute.

Cowboy Hat

Ride a Web Mother next to the Pack-a-Punch and kill about fifty enemies; the Web Mother then jumps into the machine and drops the hat, which resembles the Warden’s. It protects in part from Deathspinners and Web Mothers.

Astronaut Helmet

Gather six pieces of Mister Peeks, the head on a shelf of Her House above Quick Revive and five more around the Nexus with the Void Claw, open every door, then finish Mister Peeks’ grappling race from the Caltheris Main Chamber to the Nyxara Entrance in 50 seconds. It gives the Void Claw and Void Talon thirty more seconds.

Spiked Skull Mask

In the forest of the fruit of Nyxara, play the music box under a fallen trunk, come back for the blue toy box of the Twins and win their three games, the Teddy Bear, the Mask and the Rope, then win them again in their harder form. It adds an ammo effect: the Twins strike the ground like lightning and kill the zombies around.

Other secrets

Mister Peeks’ Dance Off

Dig sites dug with the Void Claw can give a cassette. Put into the player near Widow’s Wine on Aranea Insula, it sends the player to Her House for a rhythm game.

Hidden power-ups

Small models of the power-ups are hidden around the map: Bonus Points and Double Points in structures out of the map around Her House, Max Ammo behind the painting of Her House, Full Power, Insta-Kill, Max Armor and Nuke around the temples. Fire Sale and a Random Perk appear once the seven others are found.

Mister Peeks in Cursed

In a tiered Cursed game, Mister Peeks can dance at five spots of the map. Shot, he drops a Lucky Egg, bronze, silver or gold, full of perks, crystals, tools and weapons.

The Super Easter Egg

Once every main quest of Black Ops 7 is done, each map gets a side quest of the Twins and their toy box, and Rex Infernus holds the shelf where their toys end up, in Her House. Its own toy is the Warden:

Interact with the toy shelf, then get the Void Talon.
Under the bridge near Nyxara Passage, grapple to a lock: it leads to a rock climbing course that ends at the toy box, by Her House. Open it with Aether Shroud.
Find the three horses floating around the map, near Juggernog, Widow’s Wine and PhD Flopper. Grapple to each one and hit it once its kill type is done: kills while jumping for the shoes, kills with PhD Flopper for the skates, kills with Frenzied Guard for the jump rope.
With the three items, go back to Her House; a portal opens on the Exfil rounds. Put the items into the toy box and take the Warden toy.
Each player places the toy on the shelf for himself, or misses the final rewards.

Playdate with the Twins

With every toy found, a last activity opens in Rex Infernus: a playdate with the Twins, against the Z-Rex, the Guardian and Caltheris. Surviving it completes the Super Easter Egg and gives the Warden as an Operator, the Memento Mori skins for the crew members used, and the Mister Peeks Mayhem relic of Cursed.