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