Here is the full list of all 17 The Gardens Between achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Arina throws popcorn at Frendt five times.
Super Silly Crow is defeated.
Release the hidden Garden Friend.
Friends apart, memories remain.
Arina really shouldn't be pressing buttons.
A Cosmic Garden Friend phones home.
Pluck the moon right out of the sky.
A Garden Friend gums up the pipes.
A Garden Friend follows on a school trip.
A Garden Friend sneaks a look.
Arina’s at the end of her rope.
Saw the plank. Next, get a hammer.
Super Silly Crow escapes the TV.
What's under the table cloth?
Restore the board to a clean state.
A Garden Friend is hiding in the Esky.
A sneaky stowaway Garden Friend.