Here is the full list of all 30 Bramble: The Mountain King achievements.
Find the toy duck and place it on the grave
Defeat the swamp midwife
Brew a potion. Bring out the scales!
Survive against Näcken
Find the troll wooden figurine
Sacrifice the gnome
Defeat the butcher
Make it through Skogsrå's grove
Escape Pesta
Free yourself from Bramble
Dethrone the Mountain King
Complete the game
Jump on the mushrooms 5 times
Find all wooden figurines
Find all story books
Stab Skogsrå 100 times
Kick an apple into the goal
Complete the path of traps without any gnome casualties
Kick the pinecone folk out of the cave
Find the Lillemor wooden figurine
Find the gnome wooden figurine
Find the Lemus wooden figurine
Find the Näcken wooden figurine
Find the Tuva wooden figurine
Find the Kärrhäxan wooden figurine
Find the Lyktgubben wooden figurine
Find the Skogsrå wooden figurine
Find the Pesta wooden figurine
Find the King Nils wooden figurine
Complete a playthrough without dying or restarting levels