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.
Don't pickup anything in a level
Beat the Sacred Path
Rest easy.
Find the hidden developer room
Beat the Abyss
Destroy 5 enemies with a single sun
Beat a level's par time
Beat Solar Solstice
Beat the Forges
Destroy all decorations in a level
Beat the Arcane Expanse
Use the Axe underwater, in soul mode.
Finish a level with no mana
Get all awards in a level
Kill 10 enemies in under 10 seconds with the Axe
Find the idol of the ancient god
Finish a level with less than 10 health
Beat Domain of the Sentinels
Blow up the earth
Read all inscriptions in a level.
Find all the secrets in a level
Beat Astral Equinox
Finish a level with soul mode on
Quit the game
Extend soul mode for 30 seconds
Get 100 Overkills
Kill all enemies in a level
Find Evil Difficulty
Die in the Gateway
Get through a level without killing anything
Use a cheat code
Kill all enemies in an episode
Use each weapons soul mode attack once
Banish 10 enemies into a black hole
Experience each type of death
Finish a level with full mana
Find an obscure reference
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