Here is the full list of all 51 Aragami: Shadow Edition achievements worth 1,000 gamerscore.
Use 'Shinen' to swallow 3 guards at the same time
Perform a Ledge Kill
Get killed by an arrow while throwing a 'Kunai'
Complete Chapter 9
Make a guard suspicious 3 times in a row
Complete Chapter 8
Kill 100 enemies
Perform an aerial kill from a 10m height
Complete Chapter 7
Die. Again. And again.
Complete Chapter 6
Perform your first Shadow Kill
Completer Chapter 5
Summon 100 shadows
Complete Chapter 4
Destroy a Light Orb
Complete Chapter 3
Perform 100 Shadow Leaps
Complete Chapter 2
Obtain a 'Kami' medal
Unlock a Skill
Find a Scroll
Complete Chapter 1
Obtain a ‘Yurei’ medal
Skip a cinematic
Complete Chapter 10
Complete Chapter 11
Complete Chapter 12
Complete Chapter 13
Obtain all 'Yurei' medals
Obtain all 'Kami' medals
Obtain a 'Oni' medal
Obtain all 'Oni' medals
Find all Scrolls
Concatenate multiple stealth kills
Perform a Ceiling Kill
Die while performing a stealth kill
Unlock all Skills
Use an explosive light to kill a guard
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"
Kill the Alchemist's messenger
Blind 4 or more enemies with a Shadow Grenade