Here is the full list of all 25 Astronite achievements.
Defeat Kronch.
Thinking in the future.
Destroy the Drilling Machine.
Meet The Unknown for the first time.
Get your first upgrade.
Defeat bosses Akepoc and Akepac.
Defeat Arthron.
Defeat Pacifying Machine.
Defeat Kubra.
Defeat Khand.
Defeat Possessed Yatli
Defeat The Unknown.
A secret key for a secret room in a secret place.
Collect all 'Sphirti' chests.
Get all the upgrades.
Finish the game.
Complete all the 'Echo' rooms.
Win the Fight Festival.
Buy the double damage increase item.
Recover your 'shpirti' after dying.
Balach says goodbye.
Find the lost grave.
Drown.
Solve all the puzzles.
Complete the game with all the upgrades.