Here is the full list of all 13 Northmark: Hour of the Wolf achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Collect 40 cards
Be chanpion in all arenas
Get 50.000 gold
Hit opponent with power of 15 or more
Win 25 battles
Explore 25 locations
Find and open all chests
Reach the 10th level
Find all secret places
Win at least 1 arena
Hit oponent with power of 7 or more
Opet at least 1 chest
Find at least 1 secret place