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