Hollow Cocoon Puzzle Solutions & Achievements

Conquer puzzles and achievements in Hollow Cocoon! Unlock solutions and details with our comprehensive Puzzle Solutions & Achievements guide for a seamless experience.

There are puzzles that you need to solve in Hollow Cocoon and some achievements that you need to achieve along with them. Here you can find the solutions of the puzzles and details about the achievements with the information in this walkthrough Hollow Cocoon Puzzle Solutions & Achievements guide!

This is the guide Stef it was created by. You can find the author’s link at the end of the guide.

Hollow Cocoon Puzzle Solutions & Achievements

A detailed achievements Hollow Cocoon guide and puzzle solutions to get you your 100% as quickly and effortlessly as possible. Step by step instructions.

Misc.

These achievements are listed in the order you can earn them as you play through the game.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Mary’s Phone Call

Game over for Mary.While travelling through Ichinose on your way to Kinu’s house, you can spot a pink flyer on the side of a building near the graveyard. This flyer has a number you will need to call to start this achievement. It’s worth mentioning that the number to dial only appears after you beat the game for the first time. I’m not sure if this achievement can be completed on your first run.

  • As soon as you arrive at Kinu’s house, go inside and open the sliding door to your immediate right. In front of you will be a phone. Dial the number 9679 and you’ll receive some dialogue.
  • Now just wait in front of the phone. Don’t move or leave the area and eventually Mary will call back. She will do this a total of 5 times.
  • On the 5th call, Mary will tell you she’s at the entrance. Open the front door and step outside. Your character will make a comment and the phone will ring once more. Answer it and let the scene play out.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Chicken Strikes Back

Game over for the chickens.Once you reach Kinu’s house, you can make your way to the backyard where you’ll spot 3 chickens walking around. If you sprint into them, you’ll end up kicking them. You simply need to commit casual animal abuse until all 3 are dead.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

You’re my mom

Use chick.In Kinu’s backyard is a hen house you can go inside. On the floor is an Egg. If you use it now, it will permanently increase your defense slightly, but we’re not going to do that. Instead, hold it in your inventory until it spontaneously hatches. For me, this happened shortly after entering Miyama Mansion on my 2nd playthrough. It’s worth noting that I carried the egg all the way to the end of the game on my first playthrough and it didn’t hatch. I don’t know if it’s just RNG, or if it can’t hatch on your first run. Once it hatches, go into your inventory and use the chick.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Dirty right hand
Put your hand in both toilets.Late into the Miyama Mansion area, you will need to fish a key item out of a room labelled “Toilet” to the top-left of the map. After you’ve done so, return to another room labelled “Toilet” to the top-right of the map and stick your hand in there as well.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Game Master

Complete the 10 yen game 50 times.Scattered throughout the game are 10 Yen Coins you can collect to play various machines scattered through the maps. However, I don’t recommend going for this achievement until your 2nd playthrough (I’m not even sure if it’s possible on your 1st, as you need to WIN 50 times).

  • After you complete the game for the first time, you will unlock a Shop on the main menu where you can exchange Winning Tickets from beating the coin games for points to buy new items and cosmetics. One of these items is an Infinite Coin that costs 20 points. After you’ve purchased it, start a New Game and add the coin to your starting items. Now you can freely play the games over and over. If you’re really good at the UFO or car games, you can play those, but I highly recommend using the machine in Kinu’s backyard and just spamming it over and over. It’s quick, but it’s highly RNG based whether you’ll win or not. At least you can AFK and watch a movie or something.

Story Related

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Human

See the “Human” ending.You will receive this ending for killing Kaiko at the end of the game. If you’d like to get both this and the Xenomorph ending in one playthrough, save before reading the final diary in the underground cage. After seeing one ending, load the save and choose the opposite option.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Descendant of a xenomorph

See the “Descendant of a xenomorph” ending.You will receive this ending for sparing Kaiko at the end of the game. If you’d like to get both this and the Xenomorph ending in one playthrough, save before reading the final diary in the underground cage. After seeing one ending, load the save and choose the opposite option.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

UFO

See the “UFO” ending.- After completing the game at least once, you will unlock the Shop where you can exchange Winning Tickets for points to buy new key items. For this ending, you will first need to purchase the Tinfoil Hat for 10 pts.

  • Start a new game you’ll be given the option to start with 3 items. One of these is the hat. Make sure you have it!
  • Head to Kinu’s house and go inside. Open the first 2 sliding doors directly in front of you to spot a new poster hanging on the wall. Interact with it.
  • From there, exit back out into town and immediately look to your left to spot the UFO hovering above the tori gate in the distance.
  • Progress through until you first reach Kinu’s Storage Shed. Head inside and look at the UFO poster on the wall to your left as soon as you enter (not sure if this is required). Afterwards, head upstairs and read the note in front of the window to trigger the UFO to fly by.
  • Continue to follow the steps for the UFO ending until you reach Mayami Mansion. Once there, progress through the area as normal until you reach the upper left Bathroom. Inside the stall (directly next to where you fish out the Counting Rod Key) will be a note. Read it.
  • Continue through the area until you collect the Library Key. once you do, it will sound like Kaiko is right outside the Altar Room door and not leaving. That’s because she is. Open the door to see her standing under the light of a UFO. Make sure to hide as soon as the light disappears!
  • The UFO will fly overheard once more when you walk out into the Courtyard of the Miyama Mansion – Outhouse.
  • Now head to the Detached Tatami Room and enter the hiding closet here. As soon as you enter you’ll notice a strange symbol. Interact with it to go to a new area.
  • Walk out into the center of the field and interact with the UFO icon.

I still need to figure out if all of these steps are 100% necessary.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Mayuhime

See the “Mayuhime” ending.- After completing the game at least once, you will unlock the Shop where you can exchange Winning Tickets for points to buy new key items. For this ending, you will first need to purchase the Butterfly Key for for 10 pts.

  • Start a new game you’ll be given the option to start with 3 items. One of these is the key. Make sure you have it!
  • Proceed through the game until you reach Miyama Mansion and head up to the 2nd floor. Go past the Silkworm Room (the room with the boarded up hole in the floor) and you’ll spot a locked red door on your right. Use the Butterfly Key to open it.
  • Grab the Cocoon (red glowing ball) on the altar.
  • Finally, complete the final boss fight and a new option will appear. Feed her the Cocoon.

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Holometabolism

  • Complete the game on “NIGHTMARE” dificulty.WIP. I will play through this mode when I wake up and update this section.

Collectibles I

Hollow Cocoon | Achievement Guide + Puzzle Solutions (WIP)

Collector

Get all files.There are 42 files to collect throughout the game. 3 can only be found after completing the game for the first time. Doing so will unlock a Shop on the main menu where you can buy new key items tied to the UFO and Mayuhime endings and the final 3 notes. It’s worth mentioning that the achievement unlocked for me before I picked up all 42 notes on my 2nd playthrough. I think the game keeps track of which notes you’ve grabbed in previous runs. I’ve also included any 10 Yen Coins I found, but refer to the Misc.

Ichinose (Town)

10 Yen Coin

  • After walking off the bus at the start of the game, walk forward a few feet and look for an open metal gate on your left. Inside will be a swing with the coin on it.

10 Yen Coin

  • Leave the alley and walk forward a few more feet. On your left again will be a green vending machine with the coin inside.

10 Yen Coin

  • Across the street from the vending machine will be a small shack. The coin is on the bench in front of it.

10 Yen Coin

  • Facing the bench from the previous coin, turn to your left and head up the street, passing a bulletin board. Go up the small hill on your right near the house and walk along it, looking for a barrel on your left. The coin will be on top.

10 Yen Coin

  • Staying on this side of the road, keep moving forward to the next small shack. The coin will be on the bin hanging out on the left side of the shack.

10 Yen Coin x4

  • Cross the street and go up the stone steps to a tiny graveyard. The coins will be on one of the stones near the back.

Kinu’s House (Day)

Note (1/42) – Letter From the Village Mayor

  • Make your way to your grandmother’s house and enter the gate. Once you load in, open the red mail box in front of you.

10 Yen Coin

  • Go inside the house and open the door in front of you. Look to the left.

Note (2/42) – Old Picture 1

  • Open the door on your right, then open the small cabinet to the right of the altar.

Note (3/42) – A Letter From Minato as a Child

  • From the previous note, open the door to your right, then open the drawer on your left.

Note (4/32) – A Picture Drawn by Minota as a Child

  • Directly above the previous note, hanging on the wall.

10 Yen Coin

  • On the bookcase right of the previous note.

Note (5/42) – Kinu’s Memo

  • From the previous note, turn around and open the door. The note will be on the table in front of you.

10 Yen Coin

  • Go back to the room directly across from the front door again. This time, go through the next set of doors here. Go left, then left again into a small room. The coin is in the red drawer.

10 Yen Coin x4

  • Turn around and open the first door on your left to find a kitchen. The coins are in the drawer to the right.

Note (6/42) – Grandmother’s Daily Schedule

  • Still in the kitchen, look near the stove for a chalkboard schedule hanging on a wall.

10 Yen Coin

  • Continue through the kitchen into the backyard. Go right and you’ll spot a hen house you can enter. The coin is inside, along with an egg that will raise your defense.

Note (7/42) – Letter From Yui 1

  • Head back to the kitchen and walk out of the door. Enter the doorway directly across from you and look at the yellow mail holder on the right side of the room. Make sure you don’t rest here just yet!

10 Yen Coin

  • Turn around from the letter holder and open the sliding door. Go left and you’ll spot a small closet on your left that doubles as a save room. The coin is inside.

10 Yen Coin

  • Exit the closet and go straight towards the sink across the hall. The coin is on top.

10 Yen Coin

  • Open the door near the sink and look in top of the washing machine.

Note (8/42) – Saichi’s Response to Minato as a Child

  • Go back and enter the room next to the room we can rest in to progress the story. The note will be on top of a dresser to the left.

10 Yen Coin x4

  • In the drawer under the previous note.

Kinu’s House (Night)

Note (9/42) – Letter From a Doctor

  • After opening the combination lock door and watching the following cutscene, turn around and look on the table.

10 Yen Coin

  • On a small nightstand directly to the right of the previous note.

Note (10/42) – Saichi’s Response to Yui

  • From the previous coin, look left for a drawer you can open. A green cushioned chair is in front of it.

Kinu’s Storage Shed

Note (11/42) – Letter From Eiji

  • As soon as you load in, look on the counter in front of you.

10 Yen Coin

  • In the cabinet to the right of the coin machine.

10 Yen Coin

  • Head upstairs and wrap around the corner to find this on a stack of cushions to your right.

Note (12/42) – The Legend of Princess Mayu

  • In front of the window near the previous coin.

10 Yen Coin

  • After solving the scroll puzzle, go downstairs and crawl through the now opened hatch. It will be on your left as you enter.

Note (13/42) – Plea From the Dungeon

  • Continue down the path into a mineshaft of sorts. You’ll eventually come to a room with a large wooden cage in it. Enter the cage to find the note.

10 Yen Coin

  • Right next to the previous note.

Note (14/42) – Miyami Silkworm Records

  • Just beyond the cage is a staircase leading upwards. As soon as you open the door at the top, the note will be on a shelf directly in front of you.

10 Yen Coin

  • Behind the shelf that held the previous note.

Miyama Mansion

Note (15/42) – Red Talisman

  • As soon as you go through the trick wall and load in, look next to the save talisman.

Note (16/42) – Picture of Ayano

  • To the right of the previous note.

Note (17/42) – Miyami Family Tree

  • Continue forward a small ways through 2 more sliding doors. Before you open the 3rd set, look right to spot a black dresser you can open.

Note (18/42) – Young Saichi’s Journal 1

  • Enter the next set of sliding doors, then open the set to your right to spot the note in front of you.

10 Yen Coin

  • From the previous note, go left and enter the first door you see to find a small bathroom. Open the large stall to find the coin.

Note (19/42) – Letter From Yui 2

  • After having a door busted down on you, you will eventually exit out into a courtyard with a well on your left. Go to the other end of the courtyard and open the sliding door, then enter the room on your left. The note will be on the small table.

10 Yen Coin

  • Directly to the left of the previous note.

Note (20/42) – Young Kinu’s Journal 1

  • You’ll shortly make your way up to the 2nd floor and will need to use a plank to pry a door open. Enter the room and look to the right.

10 Yen Coin

  • On the opposite side of the debris, where you found the wooden plank.

10 Yen Coin

  • From the last coin, head down the staircase just a few steps away and you’ll spot a cabinet you can open across the room. The coin is inside.

10 Yen Coin

  • Open the door to the right of the last coin and enter the room in front of you. The coin will be on the stone stove.

Collectibles II

Note (21/42) – Young Saichi’s Journal 2

  • In the same room (Kitchen), look to your left to spot a door you can open (labelled Closet on the map). You have to come to this room to find Firewood. The note is inside.

Note (22/42) – Servant’s Lost Item

  • From the previous note, turn around and enter the room directly across from you. It will have a red steamer trunk to the right you can hide in. The note is on the table nearby.

10 Yen Coin x4

From the last note, go through the door to your right, then go left. At the T-junction, go right and open the door you’ll immediately pass by to find a save room. The coins are inside.

Note (23/42) – Complimenting the Plate

  • Exit the save room and go right. Along the left wall will be a wooden bar you can remove to access a shortcut. With the Crowbar Key in hand, make your way down the hall to the Crowbar Closet to find the note inside.

Note (24/42) – Young Kinu’s Journal 2

  • After acquiring the “Crowbar”, return to the pot you fished the Crowbar Key out of. Head back upstairs to the room that contained a hole in the floor that was boarded up. Remove the boards and drop down to find the note on your left.

Note (25/42) – Young Kinu’s Journal 3

  • Head back to the locked door that’s next to the The Counting Rod Closet and use the Peony Key to open it. Now outside in another courtyard, open the first door on your left

10 Yen Coin

  • Behind the divider in the same room as the last note.

10 Yen Coin

  • Exit the room and enter the next one to your left, then go through the next set of doors to the Entrance. The coin is on the right.

Note (26/42) – Hiding the Mulberry Crest

  • Exit the room and go left again. Around the corner is a door that leads to the Altar Room. Once inside, you can find the note near the middle of the small room.

Note (27/42) – Saichi’s Journal 1

  • Inside the shrine in the same room as the last note.

10 Yen Coin

  • Head back out to the Courtyard and open the door just ahead of you and to the left. The coin is in a cabinet on the left side of the room.

Note (28/42) – Young Saichi’s Journal 3

  • From the previous coin, open the 2 sliding doors that lead to the room labelled “Hall’ on the map. The book will be on the little podium in the center of the room.

Note (29/42) – Kyubei’s Journal 1

  • From the previous note, enter the hallway that connects the Hall to the Library and go to the end. The note is on a table to the left.

10 Yen Coin x4

  • Exit the hall and enter the room labelled “Baths” on the map to find a save room. The coins are in the tub.

Note (30/42) – Saichi’s Journal 2

  • After finding the Counting Rod Key, make your way back to the Counting Rod Closet and unlock it. The note will be directly in front of you.

10 Yen Coin

  • In a drawer to the left of the previous note.

10 Yen Coin

  • After unlocking the Library, head inside and look on the shelf to your immediate left.

Note (31/42) – Kinu’s Journal 1

  • On a table a little further into the Library. Right side of the room.

Miyama Mansion – Outhouse

10 Yen Coin x2

  • As soon as you load into the zone, go right past the save point into the next room. The coins are on the table as soon as you enter.

Note (32/42) – Doctor Yahei Shimamura’s Journal

  • On a table further into the same room.

Note (33/42) – Old Picture 2

  • In a drawer directly under the last note.

10 Yen Coin

  • Make your way to Ayano’s Room to find this coin in the large incense burner.

Note (34/42) – Story of the Trick Box

  • Make your way to Kinu’s Room to find the note near a window.

10 Yen Coin

  • From the last note, turn around and exit the room. Head into the tiny Courtyard to find the coin on the stone lamp.

Note (35/42) – Old Picture 3

  • Facing the previous coin, turn around and exit the Courtyard back into the hallway. Take a left, and then another immediate left. You should spot the note on a stand to the right.

10 Yen Coin

  • Enter the door directly ahead of you to find this coin tucked on the shelf of the large wardrobe to the left.

Note (36/42) – Kinu’s Journal 2

  • After finding the Mountain Grape Hand Mirror, slot it into Kinu’s stand to find the note inside. Pretty much impossible to miss.

Note (37/42) – Ayano’s Journal

  • After finding the Peony Hand Mirror, slot it into Ayano’s stand to find the note inside. Again, impossible to miss.

Underground Cavern

Note (38/42) – Ayano’s Scribblings

  • After loading into the area, follow the short linear path until you reach a large wooden gate covered in talismans. Open the chest to the right.

Note (39/42) – Kinu’s Will

  • Open the large wooden gate and look on the small table just ahead of you.

Collectibles III

These final 3 notes are only accessible after completing the game once and unlocking certain key items from the Shop. You then have the option to start a new game with these items in your inventory.


Note (40/42) – UFO Poster

  • You need to have the Tinfoil Hat item (10 pts) in your inventory when you start a new game. Run to Kinu’s house and go inside. Open the first 2 door in front of you to spot the poster. You can find this poster again as soon as you enter Kinu’s Storage Shed. Look to your immediate left as soon as you load in.

Note (41/42) – Kyubei’s Journal 2

  • Proceed through the game until you reach Miyama Mansion and head up to the 2nd floor. Go past the Silkworm Room (the room with the boarded up hole in the floor) and you’ll spot a locked red door on your right. Use the Butterfly Key to open it and grab the note inside.

Note (42/42) – Occult Monthly

  • Continue to follow the steps for the UFO ending until you reach Miyama Mansion. Once there, progress through the area as normal until you reach the upper left Bathroom. Inside the stall (directly next to where you fish out the Counting Rod Key) will be the note. Pretty much impossible to miss.

Puzzle Solutions

Scroll Puzzle

  • From left to right: Garden, Boat, Hawk, Lion

Rotating Puzzle

  • This puzzle seems to be randomized each playthrough. I’m going to leave my original solution up in case there’s a way to always force that set up.
  • Rotate top-right to the right x1
  • Rotate top-left to the left x1
  • Rotate bottom-left to the right x1
  • Rotate top-right to the right x1
  • Rotate bottom-right left or right x2
  • Rotate top-left to the right x1
  • Rotate bottom-left to the right x1
  • Rotate bottom-right left or right x2

Trick Box Puzzle

  • The box will start on Old Man.
  • Move the box down (S) to land on Boat.
  • Move the box right (D) to land on Princess.
  • Move the box down (S) to land on Disease.
  • Move the box right (D) to land on Silkworm.
  • Move the box down (S) to land on Cocoon.
Written by Stef

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