What is the RE9 Final Puzzle solution? Requiem's biggest mystery has finally been solved, and it's just as weird and convoluted as its name suggests. We're no strangers to a secret puzzle in Resident Evil, but RE9's Final Puzzle challenge is almost impossible to solve without a helping hand. Our complete walkthrough skips all the trial and error, leaving you free to complete it without false starts or datamines.
You need to complete a full playthrough to solve the Final Puzzle in Resident Evil Requiem, so before we get started, we have a few tips to speed up the process. Play on Casual mode to race through all the sections unrelated to RE9's Final Puzzle challenge, and create a separate manual save after each step to prevent any major setbacks in the horror game. We also recommend keeping our RE9 guides list on hand to prevent wasting time on smaller puzzles along the way.
Here are all the steps to solve The Final Puzzle in RE9:
- Process 115 zombies in Processing
- Use the grinder to defeat all enemies
- Flush the toilet eight times in Rhodes Hill
- Get Marie's Doll in the Research Facility
- Complete your playthrough
- Solve the Severed Hand puzzle
- Let the sweet pair hear the voice
Process zombies
The Final Puzzle begins once you reach the Processing section in the Rhodes Hill basement while playing as Grace. Proceed through the conveyor belt section until you reach the typewriter next to the pool of blood. In our experience, this initial step is the most likely to go wrong, so save here to reset your progress if needed.
Wait until at least 115 zombies have been dropped into the pool of blood via the conveyor belt. This takes approximately 15 minutes. Once that time has elapsed, we recommend making another manual save file just in case you haven't met the criteria, then interact with the wheel crank to drain the pool.
Use the grinder
Head down into the lower section as you would during a regular playthrough. Do not use any weapons to defeat zombies in this sequence; instead, all zombies must be fed through the grinder. Some will end up getting caught in the grinder before they even get close, but you can use your pistol to shoot any others in the leg to stagger them, or bait them into a grab so that you can push them back.
You can find out if you've done this step correctly shortly after this sequence. After Grace emerges from the blood slide, climb out of the small pool and interact with the Collection & Testing lever in the corner. You should receive the message: "A ton of blood flowed out." If it only says "a lot," you need to restart your save before the grinder and wait a bit longer.
Flush the toilet
This is where The Final Puzzle gets a little weird. Proceed to the West Wing restroom and enter the first stall on the left. Flush the toilet at least eight times (yes, seriously), then return to the safe room.
Use the typewriter to make another manual save file at this point. Make sure you don't overwrite it - you need it later on.
Get Marie's Doll
Head out into the Care Center Courtyard with Emily and progress through the Research Facility as you would on a regular playthrough. After the vat of blood in Collection & Testing explodes, you should be able to retrieve Marie's Doll at the bottom of the staircase leading back outside. If it doesn't appear, you've missed a step and need to go back to the beginning and try again.
Complete your playthrough
At this point, you're too far along in this playthrough to use Marie's Doll for its intended purpose. Drop it off in your storage box, then wrap up the rest of your playthrough. Afterwards, you can find Marie's Doll in your storage box on any new and existing save file. Reload that manual save you made in the Rhodes Hill safe room.
Solve the Severed Hand puzzle
Before we use Marie's Doll, we've got one last detour. If you haven't already, pick up the Severed Hand dropped by The Girl in front of the elevator and head to the blood analyzer in the Blood Labs. Scan the Severed Hand and complete the puzzle to receive a code:
"GGC AAG AUA ACG UGU CAU."
Four clues help you solve this riddle, but you don't actually need to view any of them to complete The Final Puzzle. However, we'll walk you through the logic anyway.
The first clue is on the label attached to the side of the blood analyzer in the Blood Labs: "G = 150000000." The second clue is on the bottom of the hourglass sitting on the desk in the VIP Suite in the Courtyard. Turn it upside down to drain the sand and reveal the clue: "U = 380.000." The third clue is in the Grace Ashcroft Blood Analysis Report note, found in the same room as the Helicopter Key in the Research Lab: "C = 4.2ly."
If you're an astrologer, you'll immediately recognize these numbers as the approximate distance certain heavenly bodies are from Earth. The sun is 150 million kilometers away, the moon is 380 thousand kilometers away, and the closest star is 4.2 lightyears away. This means:
- U = Moon
- G = Sun
- C = Star
But what about A? The final clue only spawns in after you kick the Toy Uncle bobblehead through the hoop lying on the basketball court in Raccoon City. You'll receive the following message: "There's no time for playing around." Return to Kendo's Gunshop and inspect the bottom half of the bobblehead lying in the rubble to get the final clue: "Just ignore A." With all four clues, you can translate the cipher:
"Sun, Sun, Star, Sun, Moon, Star, Sun, Moon, Sun, Moon, Star, Moon."
Let the sweet pair hear the voice
Finally, we're going to discover what The Final Puzzle's challenge description means. Return to the safe room and retrieve both Emily and Marie's Doll. Head upstairs to the Lead Researcher's Office puzzle box and enter the sequence above to trigger the sound of a child laughing. And that's it! If you've completed all steps correctly, you'll receive the following message: "Congratulations! You let the sweet pair hear the voice."
Solving The Final Puzzle in RE9 rewards 20k CP, the most you can unlock for completing a single challenge in Requiem. This tasty little nest egg can be put towards top-tier RE9 unlockables like the rocket launcher or infinite durability for Leon's hatchets. Plus, let's be honest, it feels good to see a tick in that empty checkbox.
Now that you've solved the puzzle to end all puzzles, it's time to conquer an even greater challenge with our complete guide to RE9 Insanity mode. We've also got the best RE9 mods to liven up your next playthrough, whether you're after unlimited ammo or want to see Leon fight Shrek.
