Here is the full list of all 10 Otti: house keeper achievements.
Defeat Bob and save the golden ladle
Defeat Artur and save Exgoldibur
Defeat Joe and save the magic pickaxe
Defeat mummy and save the golden cat
Defeat Great Mage
Crack all safes
Collect all gold
Break 50 vases or crates
Use honey and pot to damage an enemy
Find the hidden ruby