Resident Evil Requiem: How to Solve ‘The Final Puzzle’ and Unlock the Achievement

“The Final Puzzle” challenge in Resident Evil Requiem is notoriously complex, requiring players to collect The Girl’s Severed Hand, decipher astronomical clues, and even flush toilets. Here’s a comprehensive walkthrough to help you complete this lengthy and intricate challenge and earn the associated achievement.

Understanding ‘The Final Puzzle’ Challenge

This challenge is exceptionally complicated, but solutions have been pieced together by players like KyroGeorge and Rantyscrancy [Reddit]. Completing it may require multiple playthroughs, or at least significant backtracking within a single run. It’s recommended to start a new save file or load a save from before the meat grinder sequence in the Care Center’s basement.

Step-by-Step Walkthrough

1. Progress to the Processing Room

Begin by progressing to the Processing room from the Inspection room in the Care Center’s basement. This requires at least two joint plugs and the Forklift key.

2. Wait 15 Minutes

Once in the Processing room, wait for 15 minutes as corpses are dropped into the bloody water. This appears to be linked to the Subject 170 Record [Kotaku], which details a 2.3 milliliter sample taken from 524.3 liters of blood collected from 115 infected individuals. The wait is believed to correspond to the processing of 115 bodies.

3. Complete the Basement and Collect the Severed Hand

After waiting, proceed through the basement, attempting to send as many zombies as possible into the meat grinder without directly killing them – immobilize them by shooting their legs instead. Escape the basement and collect The Girl’s Severed Hand, found beside the elevator.

4. Flush the Toilet

Head to the Restroom in the West Wing and flush the toilet eight times. This seemingly odd step may be a reference to a clue found on the fourth page of the Investigation Report [Reddit], which features a photo of a corpse by a toilet with what appears to be the number eight written in blood.

5. Analyze the Severed Hand

Accept the Severed Hand to one of the blood analyzers in the Care Center, preferably in the Blood Lab. Analyzing the hand will display the code: “GGC AAG AUA ACG UGU CAU” [Kotaku].

6. Save Your Game

Save your game at a typewriter to avoid replaying the basement section later.

7. Decipher the Code

The code corresponds to astronomical distances. Here’s the breakdown:

• G = The Sun (150 million kilometers)
• U = The Moon (380,000 kilometers)
• C = A star (4.2 light years)

8. Collect Additional Items

• Marie’s Doll: Obtain Marie’s Doll even as escaping the Research Facility, at the bottom of the stairs during the evacuation sequence.
• Code for A: Kick the head through the basketball hoop on the Basketball Court in Raccoon City Center. Then, return to the small building north of Gun Shop Kendo and interact with the fallen figure to find the code for A.

9. Complete Your Playthrough

Finish your current playthrough, choosing the “destroy Elpis” option for a faster ending.

10. Load Your Saved Game

Load the save file created before completing the basement section.

11. Collect Marie’s Doll (Again)

Collect Marie’s Doll from an item box as Grace.

12. Analyze the Severed Hand (Again)

Re-analyze the Severed Hand at the Blood Analyzer in the Blood Lab.

13. Input the Code

With Marie’s Doll in your inventory and Emily in tow, input the code – Sun Sun Star — Sun Moon Star — Sun Moon Sun — Moon Star Moon – into the puzzle box in the Lead Researcher’s Office [Reddit]. If successful, you’ll hear a child giggle, completing the challenge.

Tips for Success

• Utilize every available tool, including playing on casual difficulty, using infinite ammo, or infinite RPGs.
• Be prepared for a lengthy process that may require multiple playthroughs.