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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsYou can get PhD Flopper free by completing the bartender Easter egg in Citadelle des Morts: collect three alcohol bottles, start the minigame at the saloon bar’s trashcan, then serve zombies drinks that match their requested colors. You can also buy the perk from Der Wunderfizz, which is available immediately in Directed Mode or from Round 25 in Standard mode.
Get PhD Flopper free with the bartender Easter egg
Collect the three bottles before starting the saloon minigame. The locations below follow the route in Destructoid’s December 9, 2024 guide.
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- Sitting Room: Find the bottle on a shelf in the castle’s left Sitting Room, near the Stamin-Up machine. The guide lists holding Square on PlayStation, X on Xbox, or F + R on keyboard and mouse to pick it up.
- Undercroft: Unlock the door from the Sitting Room toward the Undercroft Stairway. The second bottle is beside the red couch.
- Dining Hall: Return to the main hall and open the door on the right. The third bottle is on the ground beside a couch.
After collecting all three, go to the saloon and hold the interact input while looking at the trashcan at the back of the bar counter. Serve each zombie the drink color it requests. According to Destructoid, giving even one incorrect drink fails the minigame.
The listed controls come from the 2024 guide and may differ if you changed your key bindings or controller layout. If an input does not work, use your current interact and pickup bindings.
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- Cross Gen-Bundle of Call of Duty: Black Ops 6 includes Xbox Series X and Xbox One versions of the game.
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- Black Ops 6 also marks the epic return of Round-Based Zombies, fan-favorite mode where players will take down hordes of the undead in two brand new maps at launch.
- Cross-Gen Bundle of Call of Duty: Black Ops 6 will also be available on select game pass plans at launch. *
What the Easter egg rewards
Completing the bartender minigame grants PhD Flopper if you do not already have it. If you already own the perk, the guide says the reward is a random Perk-a-Cola.
Buy PhD Flopper from Der Wunderfizz instead
If you prefer not to complete the minigame, purchase the perk from Der Wunderfizz. Activision’s Citadelle des Morts map guide, published January 15, 2025, says the machine is available immediately in Directed Mode and appears at Round 25 in Standard mode. Destructoid places it on the saloon’s second floor.
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- This is signature Black Ops across a cinematic single-player Campaign, a best-in-class Multiplayer experience, and the epic return of Round-Based Zombies.
- The Black Ops 6 Campaign provides dynamic moment-to-moment gameplay that includes a variety of play spaces with blockbuster set pieces and action-packed moments, high-stakes heists, and cloak-and-dagger spy activity.
- In a best-in-class Multiplayer experience, players will test their skills across 16 new maps at launch, including 12 core 6v6 maps and 4 Strike maps that can be played 2v2 or 6v6.
- Black Ops 6 also marks the epic return of Round-Based Zombies, the fan-favorite mode where players will take down hordes of the undead in two brand-new maps at launch. Post-launch, players can look forward to even more exciting maps and groundbreaking experiences dropping into both Multiplayer and Zombies.
| Route | What you do | Availability |
|---|---|---|
| Bartender Easter egg | Collect three bottles and match drink colors to zombie requests at the saloon. | Complete the minigame; no round threshold is stated in the cited guide. |
| Der Wunderfizz | Buy PhD Flopper from the machine on the saloon’s second floor. | Immediately in Directed Mode; Round 25 in Standard mode, according to Activision’s map guide. |
The sources establish the two routes’ steps and availability, but do not compare how long either takes or which is easier.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What PhD Flopper does
Activision’s Black Ops 6 Zombies overview says PhD Flopper grants immunity to self-inflicted damage and status effects. Diving to prone triggers an explosion that grows with fall height, and the perk protects you from fall damage while diving to prone.
Quick Recap
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- The Black Ops 6 Campaign provides dynamic moment-to-moment gameplay that includes a variety of play spaces with blockbuster set pieces and action-packed moments, high-stakes heists, and cloak-and-dagger spy activity.
- In a best-in-class Multiplayer experience, players will test their skills across 16 new maps at launch, including 12 core 6v6 maps and 4 Strike maps that can be played 2v2 or 6v6.
- Black Ops 6 also marks the epic return of Round-Based Zombies, the fan-favorite mode where players will take down hordes of the undead in two brand-new maps at launch. Post-launch, players can look forward to even more exciting maps and groundbreaking experiences dropping into both Multiplayer and Zombies.
- The Cross-Gen Bundle of Call of Duty: Black Ops 6 will also be available on select Game Pass plans at launch.*
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
