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