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