Resident Evil Requiem: How to Solve the Final Puzzle – RNA Code Guide

Why the Final Puzzle Is So Infamous

After spending two full playthroughs chasing Resident Evil Requiem’s “Final Puzzle” challenge, I completely understand why it stumped the entire community for days. The in‑game hint in the Challenges menu just says: “Let the sweet pair hear the voice.” That’s it. No marker, no obvious trigger, and most of the required actions look like nonsense until you know exactly what you’re doing.

What eventually cracked it wasn’t any one genius player. It took dataminers pulling internal flags, Reddit threads diagramming RNA codes, and a lot of trial-and-error testing. I only managed to complete it after following those findings and cleaning up the rough edges in my own runs. This guide is the version I wish I’d had from the start: a clean, step‑by‑step route you can reproduce without guesswork.

Here’s what you’re ultimately doing:

• Using your first playthrough to set hidden flags (grinder wait + toilet chain) and secure Marie’s Doll.
• Using a second playthrough to pick up a Severed Hand, analyze it for an RNA‑style code, and decode it into Sun-Moon-Star symbols.
• Entering that symbol sequence in the Chief Researcher’s office while holding Emily and carrying Marie’s Doll to make “the sweet pair” hear the hidden voice and earn 20,000 PC.

If you follow the order below, you can get everything in two runs without having to restart again.

Before You Start – Requirements and Overview

Some important ground rules I learned the hard way:

• You cannot do this in a single playthrough. The Final Puzzle is explicitly multi‑run. You need one run to obtain and store Marie’s Doll, and another to actually solve the puzzle.
• Item box persistence is the key. Whether Capcom technically calls it “New Game+” or not, anything you leave in Grace’s item box at the end of the game will be available in the box when you start a new run. That’s how the doll carries over.
• The puzzle only completes while controlling Grace. All critical steps (grinder, toilet, doll, final input) are done as Grace, typically in the Care Center segments.
• Estimated time cost: If you’re already comfortable with the game, expect about 2–3 hours for a focused “setup” run and another few hours to reach the relevant sections in the second run, plus a mandatory 15‑minute real‑time wait at the grinder.

The next sections walk through exactly what to do on each playthrough.

First Playthrough – Setting Up the Puzzle

Step 1: Wait 15 Minutes at the Grinder in Processing

This is the first place I nearly gave up. In the basement Processing area of the Care Center, you reach a big room where corpses drop into a central blood pool and get shredded. The temptation is to move through as quickly as possible. Don’t.

What you need to do here as Grace:

• Enter the main Processing room with the corpse grinder and blood pool.
• Stay in this room for a full 15 minutes of real time. Don’t leave, don’t trigger the exit sequence early.
• Ideally, don’t kill any of the infected during this wait. I stayed on the move, kiting them around pillars and using stunning rather than lethal shots when possible.
• Once you’re sure 15 minutes have passed (set a phone timer), trigger the exit sequence as normal and move on.

The game is silently counting processed bodies here. The in‑universe justification comes from a file about Subject 170 (Marie), mentioning blood samples from 115 infected. The grinder wait mimics that quota. You can’t see the flag flip, but if you skip this, the doll trigger later on will fail and you’ll waste an entire run.

My tip: Save right before entering Processing, then start the wait. If you mess up badly (die, leave early, or panic and wipe the room too efficiently), reload and try again.

Step 2: Flush the Bathroom Toilet Eight Times

Once you escape the basement and are back on the Care Center’s first floor as Grace, you need to trigger the step that the community ended up calling “toilet gate”. This is the one that felt the most like a prank until the datamining confirmed it.

Do this:

• Head to the first‑floor bathroom near the kitchen in the Care Center.
• Walk into the stall with the left‑hand toilet.
• Interact with the chain and flush it exactly eight times in a row.
• Community testing – and my own run – point to exactly eight flushes being the safest. On one test run where I absent‑mindedly did nine, the Final Puzzle never triggered later.
• You can be carrying Emily while you do this; in my successful run I had her in my arms the whole time.

The very first file you can find in the game shows a corpse in a bathroom stall with a bloody number “8” on the wall. That was the clue: eight flushes. In practice, just stand there, count out loud from one to eight, and then walk away. If you forget and hit it more, reload your last save and do it again.

Step 3: Collect and Store Marie’s Doll

The real lynchpin of the Final Puzzle is Marie’s Doll. Without it in your second run, the final input simply won’t count, no matter how perfect your code is.

Later in the first playthrough, you’ll reach the secret laboratory beneath the Care Center courtyard/helipad. Near the end of this section, when the self‑destruct alarm starts blaring and you’re trying to escape:

• On the way up the exit stairs, look at the base of the staircase before you leave the lab area completely.
• You’ll see a blood‑smeared child’s doll lying on the floor – this is Marie’s Doll.
• Pick it up. Do not drop or discard it for the rest of the run.

Now comes the part that tripped me up once:

• Before you finish the game, visit any item box as Grace.
• Place Marie’s Doll into the box. Do not keep it in your personal inventory when you trigger the ending.
• Finish the game normally.

On your next run, everything stored in the item box carries over. If you forget to stash the doll, you’ll start your second run without it and will need a whole new first‑playthrough setup. Don’t make my mistake – when you get the doll, consciously plan your next box visit around it.

Second Playthrough – Getting the Code from the Severed Hand

Step 4: Pick Up the Severed Hand During the Chase

Start a new run and play as normal until Grace reaches the Care Center basement again. During the chase sequence with the twisted girl (linked to Marie), there’s a scripted moment where the creature loses an arm.

Right after that cutscene or quick‑time event:

• Look on the floor in front of or near the elevator doors you’re heading toward.
• You’ll see an item labeled something along the lines of Severed Hand (the game keeps it generic).
• Pick it up; it goes into your inventory as a key item.

If you leave this behind, you can’t get the RNA‑like code later, so double‑check your inventory before you leave the basement area.

Step 5: Solve the Laser Microscope “Atom” Puzzle

Next you need to analyze the hand at a laser microscope. I used the one in the Blood Laboratory on the East Wing, first floor, but there’s also a compatible microscope in a West Wing office later. As soon as you have access to a microscope as Grace, do this:

• Go to the appropriate lab/office and interact with the Atmo‑style laser microscope.
• Select the Severed Hand as the sample.
• You’ll see a small “atom” mini‑puzzle on the microscope interface – a grid of squares forming a stylized atom diagram.
• To solve it, press the center square first, then the far left square, then the far right square.

When you hit the correct pattern, the screen fades to black and you get a message:

“Let’s play. GGC – AAG – AUA – ACG — UGU — CAU”

This looks like a string of RNA codons (G, A, U, C). At launch, nobody knew what to do with it until dataminers found how these letters connect to the Sun–Moon–Star puzzle symbols you’ve already seen elsewhere in the game.

Step 6: Decode the RNA-Like Message into Symbols

This is the lore‑heavy, community‑decoded part. Each letter maps to a celestial body symbol (Sun, Moon, or Star), based on clues scattered through Requiem.

• G → Sun
  On the laser microscope itself there’s an inscription referencing 150,000,000 km, the distance from Earth to the Sun. The associated letter is G, so G = Sun.
• U → Moon
  In the VIP Suite off the Care Center courtyard, you can find an hourglass. If you unscrew and flip it, text references 380,000 km, the distance from Earth to the Moon. That anchors U = Moon.
• C → Star
  A private blood analysis report on Grace mentions 4.2 light years, the distance to the nearest star beyond the Sun (Proxima Centauri). That file is tagged with C, tying C = Star.
• A → ignored
  The weirdest clue involves a headless doll near Kendo’s Gun Shop in the Raccoon City section (as Leon). If you find the doll’s head on the nearby basketball court and awkwardly “dribble” it until you sink it through a fallen hoop, a tone plays. Inspecting the hoop gives “No time to play.” Back at the doll’s body, its new description reads: “Just ignore the A.” That’s the game literally telling you to drop A from the code.

So you strip all the A’s out of the microscope message.

Original code:
GGC — AAG — AUA — ACG — UGU — CAU

Remove all “A” letters:

GGC — G — U — CG — UGU — CU

Now regroup into triplets (codons) again:

GGC — GUC — GUG — UCU

Convert each letter using the mapping (G = Sun, U = Moon, C = Star):

• GGC → Sun, Sun, Star
• GUC → Sun, Moon, Star
• GUG → Sun, Moon, Sun
• UCU → Moon, Star, Moon

That’s your final input sequence for the Sun–Moon–Star puzzle device later on.

Final Step – Inputting the Sun–Moon–Star Sequence

Before heading to the final puzzle, make sure all three of these conditions are met:

• You have already analyzed the Severed Hand and seen the “Let’s play” RNA message.
• You have withdrawn Marie’s Doll from the item box so it is in Grace’s active inventory.
• You are carrying Emily in your arms as Grace.

Now go to the Chief Researcher’s Office (second floor, East Wing of the Care Center). This is the room with the familiar Sun–Moon–Star symbol puzzle device.

When all flags are set correctly, the device will be active again. Interact with it and enter the symbols in this exact order, treating each codon as a row:

• Row 1: Sun – Sun – Star
• Row 2: Sun – Moon – Star
• Row 3: Sun – Moon – Sun
• Row 4: Moon – Star – Moon

If everything is correct, you’ll hear a child’s laughter echo through the office. A message pops up confirming you’ve cleared the “Final Puzzle” challenge, and you immediately receive 20,000 PC (completion points) to spend in the bonus shop.

This is the moment when the clue “Let the sweet pair hear the voice” finally makes sense: Emily (in your arms) and Marie (represented by her doll) form the “sweet pair,” and the laughter is the “voice” they’re hearing together for the last time.

Common Mistakes and How to Fix Them

Because I messed up several of these, here’s a quick troubleshooting list so you don’t have to repeat my pain.

• Final device won’t reactivate:
  Make sure you’ve actually done the Severed Hand microscope analysis in this run. Just having the hand in inventory is not enough; the “Let’s play” message seems to be the trigger.
• No completion after entering the right symbols:
  Check two things: are you physically holding Emily, and is Marie’s Doll in your inventory (not the box)? If either is missing, the puzzle quietly fails.
• Marie’s Doll is missing in my second run:
  You probably forgot to store it in the item box before finishing your first playthrough. Unfortunately, the only fix is redoing a quick first run: set the grinder and toilet flags again and pick up the doll, then stash it properly.
• Still no success after following everything:
  The grinder wait and toilet chain are the most finicky flags. If you rushed the grinder (less than 15 actual minutes, or you wiped the enemies too fast), or spammed the chain beyond eight pulls, the game may not have registered the steps. In that case, your safest bet is a fresh two‑run attempt, being very strict with the 15‑minute timer and the eight flushes.

How the Community Finally Solved It

For context, this wasn’t something a single player just “figured out.” After release, people noticed the unsolved “Final Puzzle” challenge sitting in the menu and started poking at every oddity they could find. Even then, it took about four days of combined effort – from February 27 to early March – for everything to click.

A YouTuber, GengarCollects, appears to have been the first to trigger the completion on video, calling it “dumb luck.” Dataminers like Kyro then dug into the game files and surfaced the core requirements: the grinder timer, toilet flushes, doll flags, and the internal mapping between RNA letters and Sun–Moon–Star symbols. A dedicated subreddit and various Discords cross‑checked in‑game clues (the hourglass, the microscope plaque, the star distance file, the doll basketball mini‑event) and gradually assembled the full logic.

The result is a puzzle that feels straight out of classic Treyarch Zombies Easter eggs: brutally opaque on purpose, clearly intended to be cracked by a community rather than one lone player. From my perspective as someone who followed that breadcrumb trail after the fact, it’s frustrating, clever, and kind of brilliant all at once.

Rewards and Next Steps

Once you’ve done all of this and earned the 20,000 PC, you’ve essentially mastered one of the most convoluted secrets Capcom has ever hidden in a Resident Evil game. Those points are enough to unlock some of the juicier bonus weapons or upgrades in the extra content shop, making future runs – especially higher‑difficulty or speedrun attempts – much more comfortable.

If you’re the kind of player who enjoys deep lore dives, replay the key areas (the VIP Suite, blood lab, Raccoon City detour) now that you know how the code works. The files about distances, the hourglass, and the dolls read very differently when you understand they’re all feeding into that one eerie line: “Let the sweet pair hear the voice.”

And if you pulled this off following this guide: you’ve joined the tiny club of players who have actually seen that secret completion screen. If I can grind through two runs, a 15‑minute corpse grinder vigil, and “toilet gate” without losing my mind, you absolutely can too.