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