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