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