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