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