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