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