Here is the full list of all 15 Among Trees achievements.
Survive a bear attack
Survive for 15 days
Catch a northern pike perch
Harvest a turnip
Cook a meal on the stove
Gather 5 golden chanterelles in one day
Survive for 1 day
Survive for 50 days
Find every flora type
Build all cabin extensions
Create the wormwood brew
Sleep for 1 night in a tent
Sleep for 5 nights in a tent
Visit all exploration areas
Catch 30 fish in total