Here is the full list of all 89 Nigate Tale achievements.
Died in the First Room
Destroyed a total of 50 Cat Mint
Get 5 different Mayonna Blessings and defeat Karl
Get 5 different Alona Blessings and defeat Karl
Fall into the water
Get sprung away by Cactus Balls 10 consecutive times
Beat the Elite Team
Unlock the Talent System
Hello World
Unlock all Garden Monsters in the Collection
Meet Karl for the First Time
Defeat Karl
Defeat Karl without taking damage
Unlock 5 types of Weapons
Eat Mayonna’s "Food"
Talk with Asa for the first time
Clear 10 Rooms with less than 100 HP and defeat Karl
Defeat Bill and Lance
Defeat Little Daisy
Pilot a Mech for the first time
Defeat Beelzebub
Defeat Messiah
Defeat Oggs without taking damage
Defeat Henry without taking damage
Defeat Baphomet without taking damage
Defeat the Vampire without taking damage
Rescue Dorothy
Defeat Greed
Meet another self?
Carry 5 or more Blessings and defeat Greed
Burned to death by magma
Friendliness with the Monster Girl has reached Level 1 for the first time
Friendliness with 6 Monster Girls has reached Level 1
Participate in the interaction amongst Monster Girls
View 10 Information Fragments
Simultaneously carry Melee, Ranged, Device, and Roll Blessings in a single game
Unlock all Talents
Meet "Her"
Destroy 10 enemies with a single Arrow Rain
Destroy a total of 200 enemies using the field mechanic
Use the Gashapon Machine for a total of 50 times
Use Laser Traps to defeat 5 enemies at once
Complete the game with all of the weapons
Use Mechs to defeat a total of 100 enemies
Unlock Rothschild
Unlock Circe
Carry 3 Legendary Monster Girl Blessings in a single game
View Information Fragments for the first time
Unlock Broadsword
Unlock Shotgun
Unlock Sledgehammer
Unlock Repeater Crossbow
Unlock Springboard
Unlock Mayonna’s Monster Form
Unlock Alona's Monster Form
Unlock Asa's Monster Form
Unlock Dorothy’s Monster Form
Unlock Rothschild’s Monster Form
Unlock Circe's Monster Form
Activate Hard Mode
Clear Hard Mode
NEW_ACHIEVEMENT_DESC_4_2