Sker Ritual achievements

Escort all Lambs in under 5 minutes

Visit every location in the Deadly Lover's Fortress

Visit every location in The Ashes of Sker Hotel

Have all the perks activated at once

Visit every location in the Curse of Lavernock

Escort the Lamb to slaughter in under 2 minutes

Get a Miracle to Legendary

Survive Round 20

Complete Sewers of the Dead on Nightmare Difficulty

Complete Deadly Lover's Fortress on Nightmare Difficulty

Complete all levels including the Hidden objectives on Nightmare

Complete House of the Dammed on Nightmare