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