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