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