Paradox Junction Main Easter Egg Walkthrough – Black Ops 7 Zombies (Season 2 Reloaded)

Paradox Junction is a time-bending Nuketown remake in Black Ops 7 Zombies. You constantly switch between two timelines:

• Present (Destroyed/Ruined Nuketown): Post-nuke chaos with cysts, black goo walls, fire tornadoes, and ruined structures.

• Past (Clean/1950s Nuketown): Pristine 1950s version with intact buildings and different item spawns.

Time travel is automatic after Round 6–7 (usually on a dog/special round) or manual via Temporal Conduits (1,500 Essence each, marked on your map). The Easter Egg is fully soloable but easier in a team for escort steps. Recommended loadout: PaP’d weapons, Sundergat (the upgraded wonder weapon), Combat Axes, Molotovs, Psych Grenades, Kazimir, and perks like Depth Perception + Wisp Tea.

Rewards: Achievement/trophy, full ending cutscene, and permanent upgrades (free power-ups in some side EEs).

Step 1: Unlock Pack-a-Punch

1. In the Present, grab Truck Keys from the zombie corpse in the Yellow House Backyard (eastern fence area).

How to Pack-a-Punch in Paradox Junction │Call of Duty: Black Ops 7 Zombies

2. Survive until Round 6–7 to auto-travel to the Past.

3. In the southern Temporal Storm area (Trinity Ave extension), shoot all four glowing Space-Time Knots while killing spawned zombies.

4. The Pack-a-Punch machine permanently unlocks on Trinity Ave (usable in both timelines).

Tip: PaP your starting weapon early for survivability.

Step 2: Build the Blundergat Wonder Weapon

Collect and assemble four parts at the truck workbench in the Present Cul-de-Sac.

• Sealant: Past – Yellow House Upstairs bookshelf (bottom shelf, southeast wall).

How to get the Blundergat Wonder Weapon in Paradox Junction │Call of Duty: Black Ops 7 Zombies

• Barrel: Present only – Pop glowing yellow Loot Cysts on walls (kill ~10–20 zombies nearby; listen for chime). Multiple cysts exist (southern map especially).

How to Build the Blundergat in Paradox Junction - Black Ops 7 Zombies

• Hammer:

  • Present – Yellow House Upstairs desk: Grab SO3 Vial.

  • Present – Green House kitchen sink: Fill vial with acid (H2SO4).

  • Past – Pour acid on all 12 mannequins (smoke/chime on the correct ones; refill vial as needed).

  • Present – Hammer spawns at the correct mannequin spot.

• Stock:

  • Present – Find black goo/corrupted walls (3 possible; chime sound when close).

  • Past – Explosive (grenade/Semtex) the matching wall.

  • Present – Stock appears in the new hole.

Enter the truck in the Present Cul-de-Sac, melee the workbench, and craft the Blundergat (triple-barrel shotgun wonder weapon).

Step 3: Upgrade Blundergat → Sundergat

1. Stay in the Present for 2+ rounds. Tortured Zombies spawn inside fire tornadoes (Yellow House/Green House Backyards or Trinity Ave).

2. Lure each one to the truck workbench (no regular zombies nearby) and kill with Blundergat last hit (blue aura charges it).

3. Do this three times (third spawn is a Mimic).

4. Travel to the Past, melee the same workbench, and place the Blundergat.

5. Return to Present and grab the Sundergat (charged shots, higher damage).

Tip: PaP the Sundergat immediately (becomes “Holistic Dichotomizer”).

Step 4: Open the Secret Garage with RC-XD

1. Find the RC-XD Controller in the Present (3 random spawns: Yellow House garage shelf, crate near PaP, behind Green House).

2. Control the RC-XD: Drive up the outer ramp, boost-jump crates on the left into the locked garage on Trinity Ave.

3. Detonate next to the red gas barrel to blow open the door.

Step 5: Activate the Twins (Chalk + Swing Set)

• Inside the new garage (Present): Pick up Chalk from the dead zombie.

• Past – Yellow House Backyard swingset: Shoot the wooden seat off and collect it.

• Present: Reattach the seat + place Chalk on the swingset. Triggers Twins animation and opens more interactables.

Step 6: Light the Fireplace (Seeds → Tree → Firewood)

1. Present Yellow House Garage: Red toolbox on shelf → Irradiated Seeds.

2. Past: Plant in the dirt mound near PaP (Trinity Ave).

3. Soul-fill the growing tree with Blundergat/Sundergat kills until screen flashes white.

4. Present: Throw 3 Combat Axes at the full tree for Strange Firewood.

5. Past Yellow House: Place firewood in the fireplace and light with a Molotov.

Step 7: Music Box / Hopscotch Escort

1. Present Trinity Ave (right of Der Wunderfizz): Step on the glowing blue “X”.

2. Past: Hopscotch grid appears. Jump 1→10/12 then back down (avoid black smoke squares; 30-sec cooldown on fail).

3. Escort the glowing Music Box with Sundergat soul kills to the fireplace (grants Max Ammo on completion).

Step 8–9: Piano Teacher + Play the Piano

1. Present Green House Backyard: Hit the climbing Piano Teacher with Psych Grenade/Brain Rot. She runs to the piano.

2. Quickly switch to Past to confirm.

3. Present: Find 8 glowing blue notes (each blinks 1–8 times; fixed spots: bus, fences, garage door, bunker, rock near PaP, etc.).

4. Past Yellow House piano: Wall shows note order. Play the exact sequence (same every match).

Step 10–11: Goggles, Headset & Toybox Fill (Basketball Minigame)

• Goggles: Present – Shoot speakers behind PaP (use Wisp Tea perk to retrieve from outside map).

• Headset: Present with Depth Perception perk (3 spawns: mannequin near Wisp Tea machine, Green House upstairs, Cul-de-Sac bins).

• Place both in the blue Toybox on Trinity Ave (Past).

• Basketball minigame (Present): Shoot down floating basketball (rooftops/boxes), guide to Green House backyard “X”. In Past, bounce with knife/melee in the white squares until yellow orb spawns.

• Escort the orb/soul to the Toybox with Sundergat kills (final fill).

Step 12: Timeline Sync & Cutscene

• Present (bus near truck): Shoot clock hands to 0.

• Past: Final shot syncs everything.

• Twins appear at key locations (piano, Toybox, swingset). Yellow orb triggers the boss cutscene.

Step 13: The Dark Heart Boss Fight (Final Step)

Enter the arena (stormy sky, floating heart entity). Three phases:

• Shoot glowing weak spots/orbs on the heart.

• Dodge meteors, tentacles, and spawned zombies.

• Use Sundergat charged shots + PaP weapons + Kazimir for protection.

• Deplete the full health bar.

Completion: Full ending cutscene plays. You’ve beaten the Paradox Junction Easter Egg!

Pro Tips

• Keep Sundergat PaP’d and ammo-stocked.

• Use team for escort steps (one person guards while others kill).

• Side EEs (Mini-Golf, 115 Clocks, Mannequin Jumpscare) give free power-ups/perks.

• The EE can be done on any round after Step 1, but higher rounds make escorts harder.

This is the complete, up-to-date walkthrough compiled from verified sources as of March 2026. Good luck, survivor — the Twins are watching!