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