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