Full list of all 51 Aragami achievements. It takes around 15-20 hours to unlock all of the achievements in the base game on Windows.
The base game contains 39 achievements, and there is 1 DLC pack containing 12 achievements.
Complete Chapter 13
Obtain all 'Yurei' medals
Obtain all 'Kami' medals
Obtain all 'Oni' medals
Find all Scrolls
Complete Chapter 12
Unlock all Skills
Perform an aerial kill from a 10m height
Complete Chapter 11
Complete Chapter 10
Complete Chapter 9
Complete Chapter 8
Perform your first Shadow Kill
Use an explosive light to kill a guard
Complete Chapter 7
Use 'Shinen' to swallow 3 guards at the same time
Perform a Ceiling Kill
Complete Chapter 6
Perform a Ledge Kill
Get killed by an arrow while throwing a 'Kunai'
Completer Chapter 5
Complete Chapter 4
Summon 100 shadows
Destroy a Light Orb
Complete Chapter 3
Concatenate multiple stealth kills
Make a guard suspicious 3 times in a row
Kill 100 enemies
Die. Again. And again.
Complete Chapter 2
Find a Scroll
Perform 100 Shadow Leaps
Unlock a Skill
Obtain a ‘Yurei’ medal
Obtain a 'Kami' medal
Skip a cinematic
Obtain a 'Oni' medal
Complete Chapter 1
Die while performing a stealth kill
Complete Nightfall: Chapter I
Complete Nightfall: Chapter II
Complete Nightfall: Chapter III
Complete Nightfall: Chapter IV
Recover all Nisshoku Daggers
Kill two enemies at once with the help of Twin Shadow (Single Player)
Kill 4 or more enemies at once with the Explosive Kunai
Obtain all 'Kami' medals in 'Nightfall'
Obtain all 'Oni' medals in 'Nightfall'
Obtain all 'Yurei' medals in 'Nightfall'
Blind 4 or more enemies with a Shadow Grenade