Here is the full list of all 19 Secrets of Rætikon achievements.
Never get hurt
Don't hurt anything
Avoid the unavoidable
Never get critical health
Find all hidden rune orbs
Dive the deepest well
Get a daw to fight a buzzard
Carry a total of 130 slivers
Hurt a buzzard by letting it dash into a solid
Hatch a buzzard and let it kill a lynx
Get a buzzard to hit a lynx
Lift a lynx in the air by its tail
Feed the daw with prey
Hit an animal with a thistle
Get a female rabbit to give birth to 8 babies
Bring an animal from one area to another
Throw and Catch rabbit in mid air
Hurt an animal with a stone you dropped
Hatch a bird