Resident Evil Requiem: How to Solve “The Final Puzzle” Secret Achievement

After finishing the main campaign in Resident Evil Requiem, players can notice a mysterious unfinished achievement called “The Final Puzzle” in the extra content menu. The vague description quickly sparked curiosity within the community, and many began searching for clues to unlock it.

This guide explains how the hidden puzzle works and what steps are required to complete it.

What the Final Puzzle Means

Next to the achievement in the extra content menu there is only a single hint:

“Let the sweet pair hear the voice.”

At first glance the message seems cryptic, but several hidden clues throughout the game gradually reveal the meaning and the steps needed to solve the puzzle.

The Severed Hand

The puzzle begins after rescuing Emily from the basement of the Rhodes Hill Rehabilitation Center. During the elevator sequence, the Girl’s severed hand becomes available as an item.

Initially, the hand appears useless. It cannot be used or combined with anything and simply occupies a slot in the inventory. However, it plays an important role later in the puzzle.

Analyzing the Hand

The hand can be examined using the blood analysis system, located either in:

• the Hematology Office (East Wing, first floor)
• the Office in the West Wing (second floor)

This device is normally used to analyze samples and unlock crafting upgrades for Grace.

Placing the hand into the analyzer triggers a small puzzle involving cubes and spheres.

Puzzle Solution

1. Select the cube in the center of the screen — it will transform into a sphere.
2. Press the cube on the far right.
3. Press the cube on the far left.

Once solved, the screen turns black and displays a short message:

Let’s play

GGC AAG AUA ACG UGU CAU

This sequence acts as the main cipher for the puzzle.

Afterward, the map updates and the puzzle cabinet in the lead researcher’s office becomes active again.

Decoding the Cipher

Several clues scattered throughout the game help interpret the letters in the cipher.

G = Sun

On the microscope used earlier for analysis, an inscription reads:

G = 150000000

150 million kilometers is the approximate distance from Earth to the Sun, indicating that G represents the Sun.

U = Moon

Inside the VIP apartments, where the helicopter key can be found, there is an hourglass with the inscription:

U = 380000

This number corresponds to the approximate distance between Earth and the Moon, meaning U represents the Moon.

C = Star

In the laboratory beneath the VIP apartments, a blood report for Grace Ashcroft contains the note:

C = 4.2 ly

4.2 light years is the distance from Earth to the nearest star, so C represents a Star.

A = An Unnecessary Letter

The final clue appears later while playing as Leon in Raccoon City.

After leaving the Raccoon City Police Department, the story leads through Kendo’s Gun Shop, where a headless doll can be found.

Nearby, on a basketball court, the doll’s head lies beside a broken hoop.

Attempting to place the head into the hoop triggers Leon’s remark:

“I don’t have time to mess around.”

Returning to the gun shop afterward allows interaction with the doll, revealing the message:

“Just ignore A.”

This confirms that the letter A should be removed from the cipher.

The Final Code

After removing the unnecessary letter and decoding the symbols, the final sequence becomes:

GGC – GUC – GUG – UCU

Which translates to:

Sun – Sun – Star

Sun – Moon – Star

Sun – Moon – Sun

Moon – Star – Moon

Entering this combination into the puzzle console in the lead researcher’s office triggers the sound of a child laughing.

This laughter represents the “voice” mentioned in the original clue.

Completing the Puzzle

The code itself is only part of the solution. The phrase “Let the sweet pair hear the voice” reveals the real objective.

• The voice refers to the child’s laughter.
• The sweet pair refers to Emily and Marie (the Girl).

The puzzle must be triggered while both are present.

Step-by-Step Solution

Step 1 — Wait in the Meat Processing Area

While playing as Grace in the tunnels beneath Rhodes Hill, three power plugs must be collected to restore electricity.

Near the zombie blood reservoir, a platform with a valve and save point appears.

Remain there and watch the bodies being dumped into the blood for 15 minutes.

Step 2 — Do Not Kill Zombies

After turning the valve, the blood drains and a conveyor belt begins moving toward a meat grinder.

During this section, do not kill any zombies. Allow them to fall into the grinder on their own.

Step 3 — Return to the Facility

After reconnecting all three plugs, the elevator returns Grace and Emily to the rehabilitation center.

The cutscene with the Girl’s severed hand will occur again.

Step 4 — Flush Every Toilet Eight Times

In the West Wing bathroom, each toilet must be flushed eight times.

Leaving Emily in the safe room makes it easier to complete this step.

Step 5 — Collect Marie’s Doll

Later, the story leads to an underground complex beneath the VIP apartments.

During the escape sequence, a doll lying in a pool of blood can be found near the staircase.

This is Marie’s doll, which must be collected.

It can remain in the inventory or be stored in the item box.

Step 6 — Finish the Game

Complete the rest of the campaign normally.

Step 7 — Start New Game+

Beginning New Game+ carries over items from the previous playthrough, including Marie’s doll.

Play until reaching the elevator sequence where the Girl’s hand is severed.

Step 8 — Trigger the Puzzle

Bring Emily and Marie’s doll to the lead researcher’s office (East Wing, second floor).

• Emily must be carried
• The doll must be in the inventory

Enter the same code again:

Sun – Sun – Star

Sun – Moon – Star

Sun – Moon – Sun

Moon – Star – Moon

Once entered, the hidden achievement “The Final Puzzle” will finally unlock.

Well, now something new and interesting has been discovered… so leaving a like wouldn’t hurt, right?