Here is the full list of all 30 Slasher's Keep achievements.
Complete the undead storyline
Save Ava
Complete the jellyman storyline
Use a prisoner chute.
Eat 50 critters
Complete the amazon storyline
Complete the demon storyline
Escape a deep dungeon
Escape a frightening dungeon
Escape a marathon sized dungeon
Escape an infernal dungeon
Complete the sasquatch storyline
Let yourself be consumed
Enter an infinite dungeon
Escape a medium sized dungeon
Escape a large dungeon.
Satisfy the god of blood
Find the jade monkey
Kill Bindrick
Re-enter Slasher's Keep
Escape Slasher's Keep
Complete the northerner storyline
Escape a small dungeon
Find the lucky monkey paw
Escape the gauntlet
Complete a quest
Escape the prison
Defeat the giant spider
Craft an item
Find a secret