Here is the full list of all 39 Death end reQuest achievements.
View each and every possible outcome.
Defeat a powerful enemy in the Pain Area.
Transform into Glitch Mode countless times.
View Lydia's ending.
View Celica's ending.
View Clea's ending.
View Al's ending.
View Lily's ending.
View Shina's ending.
Transform into Glitch Mode a handful of times.
Collect 80 of the episodes.
View Lucil's ending.
Clear Chapter 11.
Defeat the final boss.
View the normal ending.
Clear Chapter 10.
Clear Chapter 9.
Defeated countless enemies.
Clear Chapter 8.
Clear Chapter 7.
Collect half of the episodes.
Visit the Strain Area for the first time.
Clear Chapter 6.
Clear Chapter 5.
Clear Chapter 4.
Learn 50 skills using Flash Drive.
Clear Chapter 3.
Clear Chapter 2.
Use a Summon for the first time.
Clear Chapter 1.
Use Install Genre for the first time.
Use a Code Jack for the first time.
Perform a Flash Drive for the first time.
Rest in camp for the first time.
Connect a Knockback combo with a party member for the first time.
Switch over into the real world.
Clear the Prologue.
Enter Glitch Mode for the first time.
Perform a Knockback for the first time.