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