Here is the full list of all 48 Nayuta no Kiseki: KAI achievements.
Earned all achievements.
Start job as a Handyman.
Complete all quests.
Show all enemies in the Enemy Info section.
Learn all recipes.
Collect all pieces of equipment.
Obtain all arts.
Donate all collectible items.
Complete all training from your master.
Complete all stages.
Analyze all star shards.
Beat the game on Normal difficulty or higher.
Beat the game on Hard difficulty or higher.
Beat the game on Infinity difficulty.
Reach level 50.
Hold 1,000,000+ mira.
Find Mishy in every chapter.
Complete 10 stages.
Complete 50 stages.
Defeat 200 enemies.
Defeat 2,000 enemies.
Defeat 5,000 enemies.
Defeat 1,000 enemies using magic (arts).
Defeat 100 enemies with a sword (skills).
Block 100 attacks using Guard.
Fall into pits 20 times.
Destroy 1,000 objects.
Collect 5,000 shining stones.
Complete 10 stages without taking damage.
Reach a Chain of 100.
Reach a Chain of 200.
Clear a stage in under 60 seconds.
Reach 50 hours of playtime.
Defeat the "Twin Colossi", Duoqurois.
Defeat the "Caller of Lightning", Palreschia.
Defeat the "Armor of Annihilation", Krabaltarf.
Defeat the "Scorching Fury", Sagiscellan.
Defeat the "Wheel of Judgement", Libradigger.
Defeat the "Amber Wing", Raegipan.
Defeat the "Azure Ogre", Ishtauros.
Defeat the "Jade Sword King", Armadalleos.
Defeat the "Crimson Demon Lord", Gladarieon.
Defeat the "Starfall Knight", Selam EI Ordeen.
Defeat the "Mythic Leader", Zext di Quarius.
Defeat the "Vacuous Planetary Core", Stell Alacran.
Begin the epilogue chapter.
Defeat the "Pure Celestial Armor", Labe Virgos.
Defeat the "Weaver of Paradise", Noi Stelladia.