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
Beat the Beruberu
Lose a game of strip-a-bobble
Taste every dish
Take a spill each, back-to-back
Clean up the rust on every fragment
Taste the hygrocybe rubescens
Beat the Lorudo
Launch a max-power assistance
Launch a max-power double-attack
Lure in Birble with creamberry fondue
Midnight skinny dip
Reach the heights
Become a bird perch
Hold each others' hands and never let go
Finish the game with 3 KO or less.
Try on the flower boots
Finish repairing the Nest
Choose to sever the flow bridge
Reach the maximum relationship level
Fill the vegetable patch
Beat the Heliga
Getting handsy under the waterfalls
Play a guitar ditty
Pacify five critters in one swoop
Hit 5 critters in their weak spot, in one swoop
Land a double backflip
Give a healing hug
Block attacks until exhaustion
Watch helplessly as the Nest falls