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