Here is the full list of all 45 Digimon World: Next Order achievements.
Acquired all achievements
Partner reborn as DigiEgg 20 times
Raised 200 types of Digimon
Raised 100 types of Digimon
Maxed out city's Prosperity
Won all Colosseum competitions
Maxed out Tamer level
Maxed out grades on all facilities as builder
Completed DigiCards
Acquired over 1,000,000 bits
Cleared all extra dungeons
First DNA Digivolution
Defeated Armageddemon
Cleared Chapter Four
Acquired over 100,000 bits
Cleared Chapter Three
Prosperity at level 100
Cleared Chapter Two
Maximum value for DigiFriend
Raised 50 types of Digimon
Prosperity at level 50
Inflicted 9,999 damage in one attack
Won 300 battles
Partner reached age 20
First Colosseum victory
All skills for Partner Digimon at 1,000
First Digivolution to Mega
First training mistake
Cleared Chapter One
First camp
First time fleeing from a fight
First Digivolution to Ultimate
First king-sized foe defeated
Inflicted 1,000 damage in one attack
First fish caught
First Digivolution to Champion
Maximum value for Bond
First Tamer level
First materials acquired
Prosperity at level 1
First food ingredient item picked up
Finished a battle with no damage
First Digivolution to Rookie
First training
First Partner Digimon reborn as DigiEgg