Here is the full list of all 28 Staxel achievements.
The base game contains 23 achievements, and there is 1 DLC pack containing 5 achievements.
Catch one of every bug
Catch one of every fish
Milk a Cow 100 times
Shear a Sheep 100 times
Plant 1000 Seeds
Bake one of each Cake
Mine 1000 Raw Stone
Cook one of each Soup
Bake one of each Pie
Cook one of each Preserve
Gather 100 Mushrooms
Catch 100 Fish
Find 100 Mixed Seeds
Reap a Gold Seed
Catch 100 Bugs
Chop 1000 Raw Wood
Use a wardrobe to change your outfit!
Deliver your farm registration letter to the mayor
Sweep a ball
Throw a ball
Gather 100 Shells
Loot a forest treasure chest
Harvest Star Jelly
Harvest Grapes, Artichokes, Purple Nettle and Rhubarb
Cook Couscous and Baked Artichoke with Goats Cheese
Collect Goats Milk and Brown Pheasant Feathers
Catch one of each bug found on the Galaxy Island.
Catch one of each fish found on the Galaxy Island