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