Full list of all 21 Garden Story achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox One.
Wake up in Spring Hamlet
Reach the Summer Bar
Take the Lift to Autumn Town
Arrive in Winter Glade
Defeat the Bookworm once
Defeat the Octopihi once
Defeat the Rotberg once
Vanquish the Grove's Clutch
Defeat 150 Enemies
Defeat 50 Acorns
Defeat 50 Shelled Oozes
Defeat 50 Hayrots
Defeat 50 Snowcaps
Defeat 50 Glomps
Upgrade a tool to Grade 4
Upgrade a jar to Grade 4
Obtain the Flute
Obtain the Silversword
Complete Goldie's Favor
Reduce the Rot Dummy to rubble
Roll 100 times