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