Here is the full list of all 44 Aragami 2 achievements.
Eliminate 25 enemies while airborne
Unlock an Ability
Unlock a Shadow Power
Find a hidden collectible
Complete your first mission
Complete the Prologue
Find all collectibles in Highcastle
Find all collectibles in Kakurega Village
Find all collectibles in Distant Countryside
Find all collectibles in Isolated Village
Find all collectibles in Lone Mountain
Find all collectibles in Woods of Memory
Complete Chapter 1
Complete Chapter 2
Complete Chapter 3
Complete Chapter 4
Complete Chapter 5
Complete Chapter 6
Complete Chapter 7
Complete Chapter 8
Complete Chapter 9
Find all collectibles in Big Akatsuchi Mine
Find all collectibles in Devastated Village
Find all collectibles in Daikizo Mine
Find all collectibles in Akatsuchi Palace
Find all collectibles in Akatsuchi’s Capital
Obtain an S-Rank in 10 missions
Counter a fireball thrown by a Scorcher
Perform a Shadow Pull on a Gatekeeper
Charm an enraged Fanatic
Perform a Stealth Assassination on a Nenshö Aragami
Kill 300 enemies
Knock out 100 enemies
Eliminate 25 enemies while grabbed to a ledge
Eliminate 10 enemies while clinging to a wall
Eliminate 10 enemies while hiding in tall grass
Craft your first Equipment piece
Apply your first Essence Runes
Purchase a Support Item for the first time
Apply a Dye for the first time
Reach Level 30
Perform a Shadow Kill
Equip the armor of a legendary hero
Skip a cinematic