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