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