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