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