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