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