Here is the full list of all 49 HARVESTELLA achievements.
Fortify all weapons to max strength
Complete all quests
Reach maximum closeness with everyone
Rear max livestock and max bond with all
Unlock all jobs
Collect all Conellu Dolls
Overcome the last trial of the Karenoid
Craft every kind of item
Destroy all walls with bombs
Defeat every kind of FEAR
Max out all 4 Break Gauges
Find all caves by digging
Harvest a high-quality Islet Watermelon
Exchange vows with a partner
Complete Chapter 10
Complete Chapter 9
Complete Chapter 8
Complete Chapter 7
Complete Chapter 6
Cook every kind of meal
Cook HQ Pure Medicinal Porridge
Catch every kind of fish
Eat Dangerous Nitro Sautee at break time
Harvest crops a total of 10,000 times
Complete Chapter 4
Complete Chapter 5
Catch 10 kinds of fish
Catch 20 fish in a day
Earn over 1,000,000 Grilla from shipping
Level up your pet to its maximum level
Expand the farm to its max size
Harvest crops a total of 1,000 times
Complete Chapter 3
Collect 10 Conellu Dolls
Clear 10 floors of the Karenoid
Feed your pet for the first time
Expand the farm to level 3
Rear your first livestock
Cook 5 kinds of meal
Defeat your first FEAR
Complete 5 quests
Improve closeness 5 times
Fortify your weapons a total of 5 times
Catch a size 10 Quotidicrab
Catch your first fish
Craft 5 kinds of item
Complete Chapter 2
Complete Chapter 1
Harvest your first crops