Here is the full list of all 22 Wunderdoktor achievements.
Find a purpose for the Wedding Ring.
Catch the bug.
Finish Act 1.
Find a purpose for the Cigarette.
Find the first almanach scrap.
Your very first patient!
Find a purpose for the Party Invitation.
Find a purpose for the Chicken Leg.
Help the Ocean Detective with his first task.
Help the Ocean Detective with his second task.
Find a purpose for the Ghostly Jewel.
Collect all Special Scraps for the Almanach.
Complete one entire page of the Almanach.
Complete the Almanach.
Finish Act 2.
Finish Act 3.
Finish Act 4.
Finish Act 5.
Play the game from start to finish without any patient deaths (except the first, unavoidable one).
Play the game from start to finish without taking any damage & without any patient deaths (except the first, unavoidable one).
Collect 100 Waxlings.
Feed 50 delicious baked goods.