Here is the full list of all 49 Root Double -Before Crime * After Days- Xtend Edition achievements.
Obtained all achievements.
Viewed all scenes.
Unlocked all TIPS.
Unlocked all memories in Xtend Episode.
Opened Xtend Episode.
Viewed √D Good Ending After.
Unlocked all event CGs in Album.
Viewed all endings/epilogues.
Viewed √D Good Ending BEFORE.
Viewed √D True Ending.
Unlocked all music tracks in Music.
Viewed Yuuri's bonus √D Epilogue.
Viewed Salyu's bonus √D Epilogue.
Viewed Mashiro's bonus √D Epilogue.
Unlocked all "Beyond*BEYOND" TIPS.
Viewed Jun's bonus √D Epilogue.
Viewed Kazami's bonus √D Epilogue.
Viewed Ena's bonus √D Epilogue.
Viewed all Bad Endings.
Set Salyu's Senses to her maximum value, and set all other characters' Senses to their minimum values.
Set everyone's Senses to their minimum values.
Set all female characters' Senses to their minimum values.
Set a character's Senses to their minimum value.
Viewed √D Normal Ending 3.
Viewed √D Normal Ending 2.
Viewed √D Normal Ending 1.
Viewed √D Good Ending Before.
Viewed √D Good Ending AFTER.
Set everyone's Senses to their maximum values.
Erased all malice in the RAM System.
Viewed the RAM System tutorial.
Unlocked 50% of TIPS.
Started √D.
Viewed √C Good Ending.
Viewed 50% of scenes.
Started √C.
Viewed √B Good Ending.
Unlocked 50% of event CGs in Album.
Set a character's Senses to their maximum value.
Started √B.
Viewed at least one Bad Ending.
Viewed √A Normal Ending.
Viewed √A Good Ending.
Unlocked 50% of music tracks in Music.
Opened the MAP screen.
Opened the TIPS screen.
Viewed the Senses Sympathy System tutorial.
Opened the Senses input screen.
Started √A.