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