[The Prison Boys] Chapter 4 Walkthrough

Chapter 3  |  Detective Games ToC  |  Chapter 5

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CHAPTER 4: INVESTIGATION

(Stage 2) The rebel
~The 7th basement, In the prison~

To earn his trust…
Suicide Note

x

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(Stage 5) Search – The news of the execution (1)
~The 3rd basement, Room 330~

Talk
Nagi Saeki
– About Saizo
– About the herb

Choice
This picture of the herb…
It’s familiar to me, too.
Is that so?

x

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(Stage 8) Search – The news of the execution (4)
~Sensou-ji temple~

Talk
Chiyo Mochizuki
– About Naoya
– About the rumors of Mr. Ohkawa
– About Ms. Mochizuki’s sister

x

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(Stage 9) Search – The news of the execution (5)
~Hyoutan pond~

Talk
A flower girl
– Today…
– The reason of the tears

Interact
A street vendor

x

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(Stage 10) Search – The news of the execution (6)
~Asakusa 12-Story Building~

Interact
Move to the Library. Tap to clear the piles of books by the left side of the room, revealing a book. {+ ‘Herb and Poisonous Weed Guide’}

x

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(Stage 13) Yamato
~The 5th basement, Library~

Yamato’s story was…
There is a contradiction.
There is no contradiction.

x

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(Stage 14) Search – After parting from Yamato
~The 1st basement, Entrance~

Talk
Kyouji Hashimoto
– About this morning’s execution
– Yamato

x

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(Stage 22) Vanished Yamato (2)
~The 3rd basement, Room 330~

“……………….”
Let’s help Yamato. (✓)
Just wait and see for a while. (Ending 6 — September 1st)

About leaving a message to Mitsuru, my opinion is…
I agree. (Note: Choose either for Ending 7. Choose this to proceed to chapter 5 at the later stages.)
I disagree. (Note: Choose this for endings 8 and 9.)

x

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(Stages 24, 25) Nagi -In the 7th basement of the prison-, Search – The 7th basement -Prison-
~The 7th basement, Hallway of the prison~

Talk
Nagi Saeki
– About Yamato
– About General Kongou

Interact
Prison
Move to General Office.

General Office
1. Use key on door.
2. Tap the off-white paper on the desk {+ note}. The red words are 戦争 (sensou), a.k.a. war. We mustn’t forget the “War”. Open the book about herbs and weeds. The trade war happened in 1839.
3. Tap the cabinet with a numerical lock. Enter 1-8-3-9. {+ lever}
4. Move to Prison.

Prison
1. Go to the nearest prison cell on the left. Tap the rod-like object on the floor, beyond the bars. After the dialogue is cleared, use sword on it. {+ Phillips screwdriver}
2. Return to the prison hallway. Tap the light gray, rectangular panel on the right. Use the screwdriver to remove all four screws. Remove the panel. {+ small key}
3. Return to the hallway. Enter the nearest prison cell on the right. Use small key on the locked cabinet beside the bed. {+ small plate with thin film, white chalk}
4. Use white chalk on the bumps of the hollowed rectangular area of the wall. Symbols will be revealed. Tapping on it will trigger a dialogue where Tetsu suggests that there may be a different POV.
5. Return to the hallway. Look through the bars of the nearest prison cell on the right. Take note of the numbers you now see on the wall.
6. Return to the hallway and go to the cabinet with a numerical lock. Enter 5-1-2. {+ small plate with thin film
7. View the flashlight in your inventory. Use screwdriver to remove the screw and open up the compartment. {+ battery}
8. Go to the ‘camera’ on the cabinet. Use the two plates with film on the slots at the side. Open the compartment below the slots and put the battery in. An image will be projected on the wall. Note the positions of the darkened rectangles.
C4 - elevator darkened.png
9. Go to the elevator at the end of the corridor. Insert lever on the slot to the left. Move the lever. The electricity will turn on.
10. Take a closer look at the buttons on the right. Tap the rectangles that were darkened in the projected image. The elevator will activate.

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(Stage 26) Search – The 8th basement -Torture Room-
~The 8th basement, Torture Room~

Talk
Nagi Saeki
– Interrogation

Interact
1. Use sword on the rabbit hanging from the ceiling, on the right. {+ wooden doll}
2. Go to the chains on the left wall. Note the vertical positions of the 3 chains and the corresponding slashes that are of the same horizontal height.
C4_2.png
3. Go to the equalizer-like thing above the axe. Leave the first column alone. Tap the topmost mark of the second column. For the third column, tap the 2nd mark from the top. The torture device hanging from the ceiling beam will come down. {+ wooden key}
4. Use wooden key on locked table at the right. {+ old record}
5. Use record on phonograph, the record player. Listen to the tune (turn on your volume): clack, thump, click, thump, clack. To the left of the table, there is a wooden stand with 3 rectangles. Take a closer look at it. Replicate the tune heard by tapping the rectangles in order: left, right, middle, right, left. A panel will open. {+ flathead screwdriver}
6. Go to the axe on the wall. Use flathead screwdriver to remove screws. {+ axe}
7. Use axe on wooden doll {+ key to 9th basement}

x

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(Stage 27) Search – The 9th basement -Laboratory-
~The 9th basement, Laboratory~

Talk
Nagi Saeki
– About Hades grass

Search
– Thick leather gloves (draped on the sink)
– Empty bottle (in drawer with the ring handle)

Interact
1. Use gloves on the flask emitting vapour. {+ heated flask}
2. If you use the heated flask under Records on Nagi, Tetsu tells Nagi that he sees something inside. Nagi will suggest to throw the contents out. Empty the heated flask in the sink. Collect the leftover solids in the sink {+ key to 10th basement, metallic hook}
3. For (Ending 7 — Hades Grass): Do not complete steps 4 to 7. Go straight to the gate by tapping ⇆. Use key on the gate and open it. (Note: For other endings and chapter 5, ignore step 3.)
4. Use metallic hook on the drawer without handle. Tetsu suggests a wrong handle might have been attached. Use watch on the hook. Open the drawer. {+plate with thin film} The plate says that a correct combination will help you avoid death.
5. Move to Prison. Go to the projector and replace the plates in it with the one from your inventory. View the projected image, it says V+H. Return to the Laboratory.
6. Use empty bottle on the rightmost shelves with a number of bottles. Combine the chemicals: Vemunft + Hilfe. {+ bottle w/ a prepared chemical}
7. Go to the gate by tapping ⇆. Use key on the gate and open it.

*If you chose to leave a letter for Mitsuru in (Stage 22) Vanished Yamato (2), you will proceed to chapter 5. Otherwise, you will proceed to the remaining stages of chapter 4 and can obtain endings 7, 8 and 9.
(Reminder: you can replay past stages from the menu > stages > select a chapter > select a stage.)

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(Stage 33) Search – The cultivation room of Hades grass
~The 10th basement, Cultivation Room~

Talk
Nagi Saeki
– The exit is…

Interact
1. For (Ending 7 — Hades Grass), wait till the timer hits 0. For other endings, ignore this step.
2. Tap the middle of the Hades Grass field and clear the soil. {+ note about September 1st}
3.  The note mentions September 1st. September (9月) is the 9th month. Go to the two wheels on the left wall. Turn the left wheel arrowhead to ‘1’ and the right wheel to ‘9’. A panel will open. {+ stepladder}
4. Place the stepladder below the ceiling vent, centre of the screen. Use screwdriver to remove the screws. Enter the open vent hole.

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(Stage 35) Nagi -falling down on the floor-
~The 7th basement, Hallway of the prison~

I’m going to…….
Go up to the surface with Nagi (Ending 8 — Buried Alive)
Go up to the surface leaving Nagi alone. (Ending 9 — My fate)

(Alternatively, you can also wait till the timer hits 0 for (Ending 8 — Buried Alive))


Chapter 3  |  Detective Games ToC  |  Chapter 5


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32 thoughts on “[The Prison Boys] Chapter 4 Walkthrough

      1. nakimushi Post author

        Hmm that’s really weird @@ I’m sorry I’ve no idea too… Nagi should have brought up the matter of leaving a message for Mitsuru, after which the choice should have came up.

        Like

      1. Vi

        pay attention to
        chapter 1 – investigation-a suspect
        chapter 2 – mitsuru
        chapter 2 – an opened book

        and choose options that favor mitsuru. say that you don’t think he’s the killer, obey him when he tells you to leave the room, choose his name during the opened book stage. the letter option should appear in chapter 4. I jumped stages (didn’t replay the game from the beginning) and it worked for me. Hope this helps.

        Liked by 1 person

      2. fabulafatalis

        Oddly, Vi’s way worked. Oddly because I had chosen THOSE EXACT OPTIONS on my firat playthrough already, which somehow DIDN’T trigger the “note” dialogue, bit after replaying those three chapters and selecting exactly the same options as previously, it somehow did. Maybe it’s a bug or something?

        Like

      3. nakimushi Post author

        Yeah, it’s really weird!! I tried to pick all the ‘wrong’ options this time round but still got the note dialogue @@ Weirdddd

        Like

    1. Guest

      To access Chapter 5 you must (re)play the game (without jumping stages)
      choosing all options that show trust towards Mitsuru and Yamato and create
      the correct antidote in Chapter 4 [DO NOT DELETE THE APP/REINSTALL THE
      GAME TO PLAY AGAIN, YOU WILL LOSE YOUR PROGRESS]

      Like

      Reply
  1. emfoemanfirztk

    * 10th basement
    I’m dying to know what is in the the locked safe .
    The thing is i already reached chapter 5 and I just met Kouji. I wonder that the thing in inside the safe would help me to prove Kouji kidnapped Yamato. Or maybe it’d lead to solve the story of Hadess grass.
    P.s: my chapter 5 process is 15 /32. The story is actually just take 14 stages and 1 bad end.

    Like

    Reply
  2. Tash

    Fro anyone who is looking for the empty glass bottle in stage 27 the 9th basement it is in the drawer next to the one you used the watch on. I spent a good 3 mins. looking for it.

    Like

    Reply
  3. Brenda

    I’ve tried using the watch on the hook multiple times but it doesn’t work. Maybe I’m clicking on the wrong thing??? I don’t know, please help

    Like

    Reply
    1. nakimushi Post author

      Use the hook on the drawer without handle first, before using the watch on the hook (that you attached to the drawer).

      Like

      Reply
  4. Mim

    to get the “leave a message for mitsuru” option, we must get full bar when interrogating mitsuru. I followed vi’s instructions but made a mistake and didnt get the option. So i replayed to get full bar and got thw option in the end.

    Like

    Reply

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