Here is the full list of all 29 Longvinter achievements.
Get 5 000 in cash
Craft an item
Build a fence
Go to snow region
Build a tent
Heal yourself to full health after your health drops down to 1
Place 10 items
Get killed
Plant a berry
Cook food
Equip a weapon
Catch a fish
Join a world for the first time
Get a kill
Kill 10 players
Kill 100 players
Plant a seed of wheat
Unlock all fishes from compendium tab
Unlock all feathers from compendium tab
Unlock all plants from compendium tab
Kill a wild capercaillie
Get 10 000 in cash
Get 20 000 in cash
Have inventory filled with wood
Build a farming plot
Equip a hat
Place 50 items
Chop down 100 trees
Equip satellite communicator