Full list of all 48 Cult of the Lamb achievements. It takes around 15-20 hours to unlock all of the achievements in the base game on Windows.
The base game contains 37 achievements, and there are 2 DLC packs containing 11 achievements.
No longer a servant, no less than a God.
Beat Kallamar without taking damage.
Beat Shamura without taking damage.
Beat Heket without taking damage.
Unlock all Follower Skins.
Unlock all fleeces.
Sacrifice 10 Followers.
Defeat the One Who Waits.
Unlock all tarot cards.
Beat Leshy without taking damage.
Gain 20 Followers.
Have 666 gold coins.
Defeat Shamura.
Defeat all opponents in Knucklebones.
Find all 5 locations.
Unlock all weapons.
Unlock all curses.
Defeat Kallamar.
Unlock all doctrines.
Fully Upgrade Cult.
Reignite the lighthouse.
Defeat Heket.
Take confession.
Cook a Follower meat meal.
Sacrifice a Follower.
Salvation awaits the fallen soul.
Gain 10 Followers.
Unlock a new fleece.
Catch 1 of every fish.
Defeat Leshy.
Win a game of Knucklebones.
A new world awaits.
Gain 5 Followers.
Let the Word be known.
Defeat the first mini-boss.
The first devotee to the Cult of the Lamb.
A deal that cannot be undone.
Collect all Relics.
Get your Gold back from Midas.
Complete a row in Purgatory.
Have 12 Disciples.
Unlock all outfits.
Completely Upgrade the Temple.
Unlock all lore.
Hatch 5 eggs.