Here is the full list of all 35 STORY OF SEASONS: Friends of Mineral Town achievements.
Catch every type of fish.
Own 5 pets.
Eat at least one of every type of dish you can make.
Reach Spring of Year 5.
Cook every kind of dish.
Have a total of 5,000,000G at once.
Win the Fluffy Festival.
Ship every type of crop.
Make 300 offerings to the Harvest Goddess. (1x per day)
Reach BF255 in a mine.
Have a total of 100,000G at once.
Reach BF100 in a mine.
Reach BF30 in a mine.
Cook 50 different kinds of dishes.
Reach Spring of Year 3.
Have a total of 50,000G at once.
Catch 50 different types of fish.
Own at least 8 cows.
Own at least 8 sheep.
Own at least 4 Angora rabbits.
Renovate every building on your farm.
Own at least one of every livestock type.
Breed at least one of every livestock type.
Own at least 8 alpacas.
Win the Moo-Moo Festival.
Get married.
Successfully confess to every romance option before marriage.
Renovate your house twice.
Cook 10 different kinds of dishes.
Reach Spring of Year 2.
Catch 10 different types of fish.
Win the Cluck-Cluck Clash.
Own at least 4 chickens.
Stay in the Hot Spring for 10 hours straight.
Ship every type of crop with ★5 quality.