Here is the full list of all 24 Slavania achievements.
First death
Find the kikimora-merchant
Defeat the Leshy
Spare the Leshy
Defeat the Pike
Spare the Pike
Defeat all bosses
Reach Novgorod
Ignore the Sorcerer’s warning
Visit all locations
Don’t let a single cow die
Overtake Kudeyar in the race
Start the firewood machine
Play with the jester
Make the hut turn around
Get inside Mazurovo
Help the Mongol brothers divide their inheritance
Burn 10 round buns with a fire spearhead
Have 1000 coins at once
Have 1000 souls at once
Pull the needle out of the egg
Defeat the stove
Collect all Babushkas
Fulfill your destiny