Achievement guide

List of all achievements

Unmissable achievements

Most of the game's achievements are, as far as I know, unmissable. Just play the game up to the end and you should get all of these:


Items related achievements:
Red marble
Find the red marble.

A key
Find the key

Battery
Find the battery.

Shrimpster
Find the shrimp jar.

Coin
Find the penguin coin.

Chicken drumstick
Find the chicken drumstick.

Golden whistle
Find the golden whistle.

Handle
Find the handle.

Red book
Find the red book.

Yellow book
Find the yellow book.

Locker's key
Find the locker's key.

Blue book
Find the blue book.

Painting brush
Find the painting brush.

Blue shoes
Find the blue shoes.

Lab's key
Find the lab's key.

Fish ticket
Find the fish ticket.

Story related:
Encounter
Complete #0.

The hole in my heart
Complete #1.

What big eyes
Complete #2.

A quantum of truth
Complete #3.

Preparations
Complete #4.

To the rescue
Complete #5

Confrontation
"Miss Sakura, is that you...?"

Our promise
Complete #6

Reunion
"I've come to see you."

A journey through memories
Complete #7

Azure
The color of this cruel world.

Unreal Life
You're going to love tomorrow's story.

Other:
Thinking
You can now collect your thoughts.

Talking
You can remember the conversations you had.

Touching
You can remember the things you touched.

Chapter related achievements

Chapter 2
Junk food
Caution: do not feed the animals.
After saving the fish, try to feed the speaking penguin with some schrimp

Chapter 3
The fluffiest boy
"How long are you going to keep petting me?"
Interact with Bern and "Touch" him during the golden whistle puzzle.

All things fluffy
A fluffy challenger appears.
After stealing the locker's key, interact again with the rabbit guard.

The brush's SOUL
"I wonder how my chum's doing."
Enter the storage room after Junior's puzzle. Then, go right away to Scull and talk to him.

Chapter 5
Weird dreams
"You're going to love tomorrow's story," or something.
During the train travel, talk to the Penguin at least twice everyday.

Great engineer
"......"
Same as above.

She thought of everything
"This bread has unlimited shelf life. It's literally as hard as a diamond."
Same as above, but with Mo's food.

Blue
The color of this beautiful world.
Go to the Whale's train station while the Whale is flying.

Intreesting trees
What's this tree?
Before bringing back Miss Sakura on road 195, interact with the tree.

Red
The color of this melancholic world.
After resolving the school puzzle, bait the turtle near the ladder, jump on its back and let it bring you to the far left of the screen.

Chapter 7
Obsession
" "
When you've brought back Miss Sakura on road 195, speak with her twice. She'll say something undecipherable that you can see by accessing it with your memories.

Intreeguing trees
"An undefined tree."
Interact with the tree after bringing Miss Sakura on road 195

A familiar face
"What are you doing here? Go away."
There is a last friend you need to say goodbye to. Go back to the museum's train station.

The crow's friend
"Did I make you worry, Cullet?"
Interact with Cullet. He's on a fence above miss Sakura.

Sleep tight
You must be tired.
After using the fish ticket, check the sleeping penguins on the first floor of the train station.

Alternative ending related achievements
Paranoia
A cliché ending, isn't it?
After Miss Sakura revelation, go to road 195 without checking the board with chalk.

Post game achievements
Singularity
It couldn't be a coincidence.
This is a weird one. After watching the true ending, immediatly load Chapter 3 save. Steal the key in the library. Go back to the lever puzzle in the Whale and use the key 40 to 50 times on the locker to unlock it.
I'm not sure about the triggering condition but it seems to be a somewhat reliable way to get the achievement.

The truth
It was the truth that found you.
Unlock the locker in the Whale. Go to the museum's storage room and have a dialogue with the owner. After Hal says "... a secret", go back to the locker room. Enter the locker, don't talk to the NPC and read the papers.

A causal exception
Too many unfolding roads.
Follow the steps for "The truth". Talk to the NPC. Then get to the true end.

A weird cat
"The pleasure is mine, familiar feline."
Unlock the locker as in "Singularity". Go back to the locker when you get to chapter 7.
"The Truth" and "A causal exception" lock the locker for good. You can't get those and "A weird cat" in the same run.

Volta related achievements

Beat 195
You need to beat 195's upgrades 8 times. Its last upgrade happens during the true end scenario.

Level 1 - Can't even read
Play against 195.

Level 2 - Getting used to it
Win against 195 after he improved.

Level 3 - Moving smoothly
Win against 195 after he gave his best.

Level 4 - Learning tricks
Win against 195 after he learned new strategies.

Level 5 - Machine learning
Win against 195 after he used machine learning.

Level 6 - Annihilation
Win against 195 in annihilation mode.

Level 7 - Apocalypse
Win against 195 in apocalypse mode.

Level 8 - Optimization
195 optimized his program for playing against friends.

Scull's missions
VOLTA pro
Make Scull remember all about the game.

To complete all Scull's missions you need to bring him:
Running symbol:
Pick any exit sign you can find. There is one at the entrance of the Whale's train station.

Shower symbol:
In the back alley

Water symbol:
On the door of the water facility

Energy symbol:
The Whale's train station

His favorite fish:
In the shopping street, there is a sign with 2 fish bones

Hand stopping time symbol:
In the museum's storage room

Secret card achievement
Beam
Unlock card.
There is one hidden volta code you can't find with Scull's mission. In the school, memorize the horn statue and draw it on Scull's canvas. He will give you the last Volta's code.

Conclusion

Many thanks for helping me with this guide!

There is most likely a bunch of inaccuracies and typos here and there. I'll try to fix them as soon as I can.

Awesome game by the way. By far the best thing I've played in a long time.

[Kryzz]

Just wanted to say.. don't give up after using the key 40-50 times. It took more than 150 times for me. When I gave up after 60 or 70 goes I ended up playing the entire true end twice more just trying to work out what I was missing when all I had to do was use the key more.

[apollo_juice_]

I'm having a lot of trouble with anything that has to be done after doing the school's puzzle and getting to the final cutscene. I havent gotten the "Complete #7" achievement and all the other ones that are really late game. Does anyone know why this is happening? Basically anything that has to be done after #6 is just impossible at the moment.

[Kata 🌸]

Theres a symbol missing for the VOLTA Pro achievement. The 2nd symbol he requests is the shower symbol you find in the back alley with Bern.

[RobinBawss]

Singularity probably only unlocks after you get the true ending once, yeah, but either way, it can take a long time to unlock. I've tried the key for 5 minutes straight on that locker for it to finally unlock.

[Ian]

Thanks a lot for your help! About "A casual exception", you don't even need to read one of the papers. As long as you talk to the NPC and keep playing up to the end of the game, you get the achievement.

I still not sure how to trigger Singularity. I only managed to unlock it after watching the unreal life ending, it might be related but I can't say for sure.

[RobinBawss]

A Casual Exception: Read at least one of the papers in the locker for The Truth achievement. Then, talk to the NPC you passed by on your way. (They should be standing in front of a monitor, neat effect, btw). You'll then get kicked out and won't be able to go back in the locker, so you won't get a chance to get A Weird Cat afterwards.
Once you're set with the previous step, just get the Unreal Life ending and 2 extra scenes will play, before the credits roll, you'll get the achievement. [/spoilers]

[Harle]

I would recommend to make a manual save after getting Singularity (and be sure to not overwrite it).
Then, get either A Weird Cat or A causal exception.
And finally, reload your manual save and get the achievement you missed earlier.

[RobinBawss]

A Weird Cat: Apparently, you cannot get this one if you want to get "A Casual Exception", because it locks you out of the locker for good. But right at the end of the game, (final chapter, when you're visiting everyone), stop by the locker again, and you should find a cat inside you can chat with.

[RobinBawss]

So far:

Singularity: Use the locker key you nab from the guard in chapter 3 on the locker at the Whale, (the one left to the switches near the elevator), and use the key a random number of times on the locker until it unlocks. (Yeah, that's what we got so far, it can take 50 attempts, it can take 500, it's completely random.)

The Truth: After helping the ant go through the Museum Gallery, you get access to the paintings on the back. If you go further, you have a dialogue with the receptionist. The dialogue ends with "... A secret?" and that's when you have to go back to the now open locker at the Whales. In there, walk all the way, don't talk to the NPC in there, just keep going until you find notes on the wall, read them all.

[Ian]

Thanks you a lot for your input! I'll be by to help you on the discussion thread if I ever find something worth mentionning.
According to Hako's twitter, the last 2 achievements really are important story-wise, I wish I had more time to look for them.