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