Here is the full list of all 32 Made in Abyss: Binary Star Falling into Darkness achievements.
Obtain all achievements.
Unlocked 50 skills.
Defeat Detchuanga.
Suffer the 1st to 5th layerfs strains.
Receive Nanachi's best dish review.
Clear Regfs episode.
Become a White Whistle.
Clear DEEP IN ABYSS.
Collected 200 Relics.
Visit over 40 stages.
Become a Black Whistle.
Reach the fifth layer the first time.
Clear Rikofs episode.
Unlocked 30 skills.
Reach the fourth layer the first time.
Collected 100 Relics.
Become a Moon Whistle.
Reach the third layer the first time.
Become a Blue Whistle.
Collected 50 Relics.
Unlocked 10 skills.
Learn a new skill for the first time.
Become a Red Whistle.
Clear HELLO ABYSS.
Collected Information with the Monocular for the first time.
Reach the second layer the first time.
Craft something for the first time.
Be affected by ascension strains.
Cook a dish for the first time.
Collected 10 Relics.
Obtained Relic for the first time.
Reach the first layer the first time.