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 Shamura without taking damage.
Beat Kallamar without taking damage.
Defeat the One Who Waits.
Beat Heket without taking damage.
Unlock all tarot cards.
Unlock all fleeces.
Sacrifice 10 Followers.
Defeat Shamura.
Defeat all opponents in Knucklebones.
Unlock all Follower Skins.
Find all 5 locations.
Defeat Kallamar.
Unlock all doctrines.
Unlock all weapons.
Unlock all curses.
Defeat Heket.
Gain 20 Followers.
Beat Leshy without taking damage.
Unlock a new fleece.
Catch 1 of every fish.
Sacrifice a Follower.
Win a game of Knucklebones.
Reignite the lighthouse.
Defeat Leshy.
Fully Upgrade Cult.
Cook a Follower meat meal.
Salvation awaits the fallen soul.
A new world awaits.
Gain 10 Followers.
Take confession.
Gain 5 Followers.
Have 666 gold coins.
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.
Complete a row in Purgatory.
Get your Gold back from Midas.
Collect all Relics.
Unlock all lore.
Unlock all outfits.
Have 12 Disciples.
Completely Upgrade the Temple.
Hatch 5 eggs.