Here is the full list of all 104 I Shall Remain achievements.
Kill 500 elite infected
Throw 50 grenades
Recruit C.J.
Unlock Thomas's second ability
Kill Hunterlag
Kill Krass
Plant 50 mines
Use mechanical actions 100 times
Reach level 30 with main character
Kill Vilebyrd
Recruit Jim
Kill Newborn
Kill Wilson
Unlock Tommy's second ability
Recruit Thomas
Unlock Patrick's second ability
Kill Reaper
Kill Realdead Man
Use medical actions 100 times
Reach level 20 with main character
Use medical actions 50 times
Use mechanical actions 50 times
Unlock Cathy's second ability
Kill Strider
Kill Lisard
Read 20 books
Kill Ghunter
Read 10 books
Kill Carrie
Kill 100 elite infected
Recruit Cathy
Kill Linger
Plant 10 mines
Meet Julia
Use medical actions 10 times
Reach level 10 with main character
Recruit Tommy
Kill 50 elite infected
Recruit Andrea
Kill Infant
Kill 1000 infected
Use mechanical actions 10 times
Repair the tank
Throw 10 grenades
Recruit Patrick
Kill 10 elite infected
Kill 500 infected
Kill Murthog
Meet Dr. Andre Gratia
Kill Coloth
Kill Beizel
Kill 200 infected
Finish Prologue
Find Michael, your brother
Kill Gobber
Kill 100 infected
Read one book
Kill one Infected
Reach level 40 with main character
Read 30 books
Kill 5000 infected
Use medical actions 500 times
Use mechanical actions 500 times
Throw 100 grenades
Throw 500 grenades
Plant 100 mines
Plant 500 mines
Unlock Andrea's second ability
Unlock Jim's second ability
Unlock C.J.'s second ability
Finish the story on Easy difficulty
Finish the story on Normal difficulty
Finish the story on Hard difficulty
Finish the story on Impossible difficulty
Finish the story on Easy difficulty (Hardcore)
Finish the story on Normal difficulty (Hardcore)
Finish the story on Hard difficulty (Hardcore)
Finish the story on Impossible difficulty (Hardcore)
Finish the game without using any unique weapon
Finish the game with "Civilian" perk
Finish the game with "Athlete" perk
Finish the game with "Fighter" perk
Finish the game with "Detective" perk
Finish the game with "Policeman" perk
Finish the game with "Trooper" perk
Finish the game with "Agent" perk
Finish the game with "Sapper" perk
Finish the game with "Chieftain" perk
Finish the game with "Survivalist" perk
Kill Bunny
Kill Guardian
Kill De Rossi
Kill Freddy
Kill Geronimo
Kill Hetzenauer
Kill Child
Kill Kramer
Kill Big Brother
Kill Martha
Kill Monk
Kill Renan
Kill Crawler Aberration
Kill Mantis Aberration
Kill Halfing Aberration