Here is the full list of all 30 Haven achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Try on the flower boots
Choose to sever the flow bridge
Finish repairing the Nest
Reach the maximum relationship level
Lure in Birble with creamberry fondue
Fill the vegetable patch
Beat the Heliga
Give a healing hug
Launch a max-power double-attack
Pacify five critters in one swoop
Hit 5 critters in their weak spot, in one swoop
Block attacks until exhaustion
Land a double backflip
Watch helplessly as the Nest falls
Hold each others' hands and never let go
Become a bird perch
Take a spill each, back-to-back
Reach the heights
Launch a max-power assistance
Finish the game with 3 KO or less.
Beat the Beruberu
Beat the Lorudo
Choose not to sever the flow bridge
Midnight skinny dip
Getting handsy under the waterfalls
Taste the hygrocybe rubescens
Play a guitar ditty
Lose a game of strip-a-bobble
Taste every dish
Clean up the rust on every fragment