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