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