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