Here is the full list of all 34 Elypse achievements.
Get out of the hut at the beginning.
Discover the chasm of the damn.
Discover the Abyssal caverns.
Kill a ennemy using another enemy projectile.
Die in a lava lake.
Buy the hut to the Beggar.
Summon the Beggar in your hut.
Talk to the forgotten soul.
Defeat the chasm of the damn boss.
Get the chasm of the damn boss head though a door in the room.
Kill 5 ennemies within one celestial dive.
Kill the first Golem you will meet.
Stun an airborn Golem.
Defeat the spirit of the Abyssal caverns.
Defeat the Abyssal caverns boss.
Discover the forgotten temple.
Absorb the forgotten temple spirit.
Discover the surface.
Admire the floating island explosion.
Die more than a 100 times.
Destroy the soul crystal in the Beggar's house.
Discover the Nokron tower.
Defeat the Nokron tower boss.
Place 10 huts during the adventure.
Read every optionnal dialogue.
Unlock every celestal pulse and thorn.
Destroy every soul crystals in the game.
By all the objects and improvements.
Destroy the final hand during the opening of phase 2.
Defeat the final boss.
Finish Elypse.
Finish Elypse in less than 2 hours.
Acquire every success.
Use your celestial dive on a kill-zone.