Here is the full list of all 50 Remember Me achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Finish the game in Memory Hunter Mode
Reach all memory bugs in all memory remixes
Hit 5 enemies at once with a Logic Bomb while they are stunned by the Sensen DOS
Perform 40 8-hit Combos
Find and activate all interactions in all memory remixes
Beat 400 enemies
Find all Focus Boosts
Find all SAT Patches
Find all Mnesist memories
Find all Scaramechs
Beat a Mourner without beating its supporting sidekicks
In the Scylla memory remix: have Scylla and Nilin avoid the accident and get on their way home
Beat 15 Stranglers without using the Sensen DOS
Beat 15 enemies by making them fall off a platform
In the Forlan memory remix: have Forlan get the gun, argue with Alexia but not kill her
Beat Madame without hitting any of her clones
Finish 15 Enforcers off with the Spammer
Beat a Zorn in under 120 seconds
Survive the entire Leaking Brain assault (episode 3) without using Power or Regen Pressens
Make 50 Leapers fall off walls
Beat Kid X-Mas in under 5 minutes without dying
In the Olga memory remix: have David awaken and talk to Olga
Finish the game in Script Kiddie Mode
Finish the game in Errorist Agent Mode
Destroy H3O
Reach x14 with the Sensen Fury
Remix Charles
In the final memory remix: have Jax short-circuit, but keep everybody safe
Finish episode 7
Use the Sensen RIP to make robots knock 20 human enemies out
Trigger two Logic Bombs in less than 15 seconds
Dodge a Skinner's charge five times in a row
Beat 20 robot enemies
Destroy 20 Heavy Enforcer shields
Finish episode 6
Defeat 5 Elite Enforcers without using Combos or Spammer attacks
Destroy the Zorn that chased you in the prologue
Finish episode 5
Remix Scylla
Get hit 5 times by a drone during a playthrough, on any given difficulty
Finish episode 4
Remix Forlan
Equip 17 Pressens at least once in your Combos
Finish episode 3
Land 10 Combos that combine the four different Pressen types
Finish episode 2
Perform your first memory steal on Bad Request
Finish episode 1
Remix Olga
Finish episode 0