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