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