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