Here is the full list of all 86 Astral Ascent achievements.
Find the hidden nest in the Garden
Unlock Oloon
Unlock Calie
Unlock Octave
Unlock Papa Yalee
Unlock Sire Bapy
Perfect 30 Fight Rooms
Start 30 escape attempts
Unlock Barbecue
Defeat Cancer
Defeat Virgo
Summon a Zodiac to support you
Success a Zodiac Challenge
Defeat Libra
Defeat Pegasus
Defeat Scorpio
Defeat Monoceros
Meet Chamaeleon
Defeat Aries
Defeat Sculptor
Defeat Capricorn
Captured 5 Astral Spirits
Unlock the Path of Destiny
Face The Master
Reach the Event Horizon
Defeat Gemini
Equip an Astral Gambit
Defeat Hydra
Change a Spell affinity in The Sun Room
Reach the Crimson Highlands
Defeat Pisces
Upgrade a spell to level 10
Defeat Lupus
Reach the Coral Archipelago
Defeat Leo
Defeat Draco
Reach the Red Barrens
Reach 1000 damage in one combo
Defeat Taurus
8 stones of each type equipped simultaneously
Buy all items from an Itinerant Peddler
Use 200 Stars in a run
Obtain 1000 Quartz in a run
Unlock the Peddler
Unlock Zim-Zim
Equip an Astral Aura
Reach the Garden
Equip 4 affinity gambits on a spell
Reach level 12
Obtain 5 Echoes in a run
Open 150 Key Chests
Equip a Zodiac Spell in The Moon Room
Your Zodiac sign helps you 3 times
Trigger 12 dialogues on Benches
Save all Yalees from the Kingdom
Use your Signature Spell 500 times
Unlock all Zim-Zim abilities
Unlock all Auras from Barbecue
Unlock all spells from the Peddler
Unlock all Oloon colors
Collect all memory fragments for Papa Yalee
Complete 50% of Sire Bapy’s achievements
Defeat Sagittarius
Defeat Aquarius
Defeat Taurus at Destiny Level 6+
Defeat Virgo at Destiny Level 6+
Defeat Capricorn at Destiny Level 6+
Defeat Aries at Destiny Level 6+
Defeat Sagittarius at Destiny Level 6+
Defeat Leo at Destiny Level 6+
Defeat Pisces at Destiny Level 6+
Defeat Scorpio at Destiny Level 6+
Defeat Cancer at Destiny Level 6+
Defeat Libra at Destiny Level 6+
Defeat Aquarius at Destiny Level 6+
Defeat Gemini at Destiny Level 6+
Defeat The Master at Destiny Level 6+
Defeat 30 Star Guardians
Collect 100 Destiny Fragments
Activate all abilities of the Void Catalyst at once
Upgrade a spell to level 15
Success an escape at Destiny Level 15+
Unlock Ayla’s ending
Unlock Kiran’s ending
Unlock Octave’s ending
Unlock Calie’s ending