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