Full list of all 43 AMID EVIL achievements. It takes around 12-15 hours to unlock all of the achievements in the base game on Windows.
The base game contains 37 achievements, and there is 1 DLC pack containing 6 achievements.
Use a cheat code
Find an obscure reference
Use each weapons soul mode attack once
Finish a level with no mana
Get all awards in a level
Find the idol of the ancient god
Get through a level without killing anything
Don't pickup anything in a level
Rest easy.
Find the hidden developer room
Beat the Abyss
Banish 10 enemies into a black hole
Beat the Arcane Expanse
Experience each type of death
Finish a level with full mana
Beat the Forges
Quit the game
Beat Solar Solstice
Beat the Sacred Path
Finish a level with less than 10 health
Finish a level with soul mode on
Blow up the earth
Beat a level's par time
Beat Domain of the Sentinels
Extend soul mode for 30 seconds
Kill all enemies in an episode
Beat Astral Equinox
Kill 10 enemies in under 10 seconds with the Axe
Destroy 5 enemies with a single sun
Get 100 Overkills
Destroy all decorations in a level
Find all the secrets in a level
Use the Axe underwater, in soul mode.
Read all inscriptions in a level.
Kill all enemies in a level
Find Evil Difficulty
Die in the Gateway
Kill 15 enemies in under 10 seconds with the gauntlets
Kill 10 enemies with the Void Splitter's soul mode attack
Defeat the Thunder Spirit
Beat the Black Labyrinth
Find the 3 Developer Artifacts
Defeat the creature