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