Here is the full list of all 45 Digimon World: Next Order achievements.
Maxed out grades on all facilities as builder
First time fleeing from a fight
Won 300 battles
Won all Colosseum competitions
Cleared all extra dungeons
Acquired over 1,000,000 bits
Maxed out city's Prosperity
First training mistake
Raised 50 types of Digimon
First Colosseum victory
Defeated Armageddemon
Partner reached age 20
Cleared Chapter Four
Cleared Chapter Three
Prosperity at level 100
Maximum value for DigiFriend
Cleared Chapter Two
Acquired over 100,000 bits
First camp
Prosperity at level 50
First king-sized foe defeated
Inflicted 9,999 damage in one attack
All skills for Partner Digimon at 1,000
First Digivolution to Mega
Cleared Chapter One
First Digivolution to Ultimate
First fish caught
Maximum value for Bond
First Tamer level
Inflicted 1,000 damage in one attack
First food ingredient item picked up
First Digivolution to Champion
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
Acquired all achievements
First DNA Digivolution
Raised 100 types of Digimon
Completed DigiCards
Partner reborn as DigiEgg 20 times
Raised 200 types of Digimon
Maxed out Tamer level