Welcome to NGB and our walkthrough for Rain Code Chapter 4 | The Imperfect Insider in Master Detective Archives!
Kamasaki District
Before you start the main chapter, you can complete the following requests:
- No. 13 Her Name Is Fubuki, the Legendary Waitress!
- No. 14 Lending the Church a Hand Again
- No. 15 Lost in the Rain
- No. 16 The Fortune Teller Sees All
Check out our Chapter 4 Requests guide page for more information on how to start and complete these requests.
Once you’re ready to begin the main quest, interact with the following in the Kamasaki District:
- Serious Woman – Southwestern corner, west of the bus stop
- Mild-Mannered Man – Northwestern corner
- Sullen Man – Underground Sector
- Gossipy Woman – Underground Sector
- Difficult Man – Northeastern corner
After you’ve spoken with everyone, Kurumi suggests visiting Makoto so head to Kanai Tower.
Kanai Tower
Approach the elevator to trigger a cutscene. Speak with Makoto about the Secret Lab. Before you leave, make sure to grab the Memory Shard – Kanai Ward’s Highest Welcome from the light fixture near the front door!
Nocturnal Detective Agency
After speaking with Makoto, head to the Nocturnal Detective Agency and speak with the following people:
- Chief
- Kurumi
With your goodbyes said, Yuma will exit the agency with Kurumi hot on his heels!
Kanai Station
Grab the Memory Shard – Yellow Car and Lion Statue from the mouth of a lion statue along the river on the south side of the area. When you interact with the yellow car, the game will tell you that it will be impossible to return here for some time. When you’re ready, agree to continue.
Amaterasu Corporation
When walking with Makoto, you’ll have the opportunity to speak with him about 3 topics. Go through them all then you’ll continue the tour with Makoto. After exiting the elevator, approach the Peacekeeper to find out why the gate’s open. When you gain control of Yuma, follow Makoto through the lab.
After the long cutscene, you’ll find yourself in the Security Room. Make sure to pick up the Memory Shard – Patrolling on the chair!! When you’re ready, interact with the door to leave the room. After the cutscene, interact with the door again to actually leave.
When at the doctor’s door, you’ll be presented with a question: “To bypass security and protect the doctor, I should…”. Select Use a toy.
Run down the hallway and approach Desuhiko. After a quick cutscene, you’ll be able to explore the Robot Lab. Make sure to grab the Memory Shard – Find the Secret of the Toys from the robot’s arm then interact with the following objects in this room:
- Ama-Pal Poster
- Neurotic Researcher
- Lab
- Shelf
- Sleep-Deprived Researcher
- Monitor
- Ama-Pal
- Robot Researcher
When you regain control of Yuma, interact with the Intercom. You then need to drive Ama-Pal to Dr. Huesca’s critical lab. After making it through the toxic gas room, you’ll be posed with the following question: How do I keep stepping on the panels in the right order? The answer is Fubuki’s Ability!
After Desuhiko gives the Panel Room puzzle a try, he’ll give the controller for Ama-Pal back to you. The correct pattern of the panels to step on is as follows:
- Up
- Left
- Up
- Right
- Up (towards wall not door)
- Left
- Up (Do not set on the left panel in front of the door! Instead head up and walk off onto the narrow pathway.)
Congratulations! You successfully made it across the room. As you approach the door, a cutscene will trigger. Afterwards, press X to extend Ama-Pal’s arm to the switch then press X to retract it. Maneuver the robot around the door. After the cutscene, interact with the following:
- Doctor’s Corpse
- Disarm Button
Press X on the disarm button when prompted. Yuma and his friends will rush in and a long cutscene will trigger. When you arrive in the Amaterasu Lab (Security Room) again, speak with all the detectives. Speak with Fubuki again to progress the story then speak with Vivia to learn about his Forte.
After gaining control of Yuma, pass through the door. Approach the ghosts to receive a tutorial on Spectral Projection. Make your way to the doctor’s lab. You’ll need to follow the paths with the smaller ghosts. Slip past them until you finally reach the lab in the north. Once in the Critical Lab, begin your investigation! Interact with the following items:
- Front Chamber
- Intercom
- Air Lock
- Decontamination Device
- Toxic Gas Chamber
- Toxic Gas Vents
- Panel Chamber
- Decontamination Device
- Door Switch
- Main Chamber
- Ama-Pal
- Doctor’s Corpse
- Doctor’s Corpse
- Knife Used as Murder Weapon
- Medicine Cabinet
- Doctor’s Computer
- Doctor’s Notebook
- Two Peacekeepers
- Food Cabinet
- Vent
Once you’ve investigated everything, select to end the investigation. Backtrack to the front chamber and pass through the wall to encounter Vivia. After the long cutscene, return to the Security Room. Follow after Vivia through the door. Another investigation will occur. Inspect the following:
- Northeastern Hallway
- Researcher and Peacekeeper
- Storage
- Disorganized Files
- Central Lab
- Eavesdrop
- Large Machine
- Some Sort of Machine
- Inspection Machine
- Equipment
- Lab
- Two Researchers
- Shelf
- Electrical Room
- Server Equipment
- Electricity System
- Researcher and Peacekeeper
- Northern Hallway
- Bloodstains on the Floor
- Houseplant
- Robot Lab
- Lab
- Monitor
Once you’ve checked everything that you could, end the investigation. When you regain control of Yuma, head to the Critical Lab. Approach the Doctor’s Computer then interact with it.
Mystery Labyrinth
Next up is you guessed it… the Mystery Labyrinth!!! When you regain control of Yuma, head down the long hallway. At the end you’ll be presented with your first Mystery Phantom. Take Yomi out using a Reasoning Death Match!
Reasoning Death Match
| Statement | Solution Key / Repel |
|---|---|
| There couldn’t be an intruder! | Shoe Print of Ama-Pal’s Head |
| You proved that yourself! | Repel |
| There’s no place to hide in the critical lab! | Air Lock Decontamination Device |
Mystery Labyrinth Option
Immediately following the Reasoning Death Match, you’ll be presented with a question… Was there an intruder? The answer is Yes! After selecting this answer, continue down the long hallway and pass through the doorway at the end. You’ll reach another question: How did the culprit enter the lab? All 3 answers are incorrect but you’ll need to work through each one. Select each option then use logic to say why it is not correct.
| Option | Logic |
|---|---|
| Deactivated security by cutting power | Security Power Supply |
| Never entered in the first place | Stab Wounds in Back |
| Invited in by the doctor | Security Log |
| Entered and killed via Spectral Projection | Ghost Form Traits |
Shinigami Puzzle
For this puzzle, the question is “Who” is capable of overcoming the security system? The answer is Am – A – PA – L!
Mystery Labyrinth Options
For the question of “Who are you?” was directed at who?, the answer is No one!
Reasoning Death Match
| Statement | Solution Key |
|---|---|
| The doctor was loyal to Amaterasu! | The Doctor’s Email Records |
Mystery Labyrinth Options
| Question | Answer | Solution Key |
|---|---|---|
| How did the doctor plan to escape Kanai Ward? | Swapping Places | The Doctor’s Notes |
| The culprit entered the lab before Ama-Pal | Yes |
Spot Selection
During this Spot Selection, you’ll be asked where was the culprit before the crime was committed. The answer is the Air Lock (long horizontal rectangle).
Mystery Labyrinth Options
| Question | Answer |
|---|---|
| How did the culprit use Ama-Pal? | Neither |
| Where was the culprit before the crime? | On top of Ama-Pal’s head |
| Hod did the culprit use Ama-Pal? | As transportation |
| What caused Ama-Pal to malfunction in the air lock? | Culprit jumped on it |
| Why didn’t the culprit appear on camera? | They were on top of the head |
| When did the culprit get off Ama-Pal? | When opening the door |
Reasoning Death Match
| Statement | Solution Key / Repel |
|---|---|
| If Ama-Pal’s line of sight changed just a bit… | Ama-Pal’s Design |
| It wouldn’t be from behind | Repel |
| He would’ve heard someone coming! | Information on Dr. Huesca |
| No living human can breech it | Fubuki’s Forte |
| You’ll die before reaching Huesca | Toxic Gas Properties |
| The hitman | Repel |
Culprit Selection
After you defeat both the Mystery Phantom and Vivia, you’ll be posed a question: What was the clue leading to the true culprit? The correct Solution Key is the Photo. Afterwards you’ll need to select the culprit. Choose the middle photo (the one containing Yakou Furio).
Battle with Vivia
For this battle, just press the first prompt that appears. When you get to the question: Who caused the blackout? Wait until you get the prompt for Fink the Slaughter Artist.
Deduction Denouement
With all the mysteries solved, it’s time to put everything together. To solve how the whole crime played out, you’ll need to create the book. The table below lists which Solution Key goes on which page. When you’re done a scene will play out going through the whole incident.
| Page | Solution |
|---|---|
| Part 01 Target’s Location | Amaterasu Corporation |
| Part 02 Crime Preparations | Peacekeepers |
| Part 03 Lab on High Alert | Intercom |
| Part 04 During the Blackout | Decontamination Device |
| Part 06 How to Bypass Security (1) | Ama-Pal |
| Part 06 How to Bypass Security (2) | Fubuki’s Power |
| Part 07 Dr. Huesca’s Murder (2) | Knife |
| Part 08 Culprit’s Murder (1) | Fink |
| Part 08 Culprit’s Murder (2) | Yakou |
After the Deduction Denouement, you’ll be presented with a question: Have all the mysteries been solved? Select Some mysteries remain.
Shinigami Puzzle
| Question | Answer |
|---|---|
| The remaining mystery is Dr. Huesca’s _ _ _ _ _ | E – M – A – I – L |
Reasoning Death Match
| Statement | Solution Key / Repel |
|---|---|
| It’s solved. | Repel |
| There is nothing connecting Yakou to Anonymous! | Lab Map |
| Anyone could find it! | Storage Key |
After the long cutscene, speak with Makoto.
Abandoned Building (Rooftop)
Speak with Kurumi.
River Bank
After the long cutscene, speak with Vivia.
Nocturnal Detective Agency
When you’re ready to close out the chapter, speak with Halara then Vivia!
Additional Rain Code Guides and Walkthroughs
Be sure to check out our Master Detective Archives: Rain Code guides and walkthroughs page for more helpful guides!