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