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.
Unlocked all "Beyond*BEYOND" TIPS.
Unlocked all event CGs in Album.
Opened Xtend Episode.
Viewed √D True Ending.
Viewed all endings/epilogues.
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 Jun's bonus √D Epilogue.
Viewed Kazami's bonus √D Epilogue.
Viewed Ena's bonus √D Epilogue.
Viewed √D Good Ending BEFORE.
Viewed √D Good Ending After.
Viewed √D Good Ending AFTER.
Viewed √D Good Ending Before.
Set everyone's Senses to their maximum values.
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.
Viewed √D Normal Ending 3.
Viewed √D Normal Ending 2.
Viewed √D Normal Ending 1.
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.
Unlocked 50% of music tracks in Music.
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.
Opened the MAP screen.
Opened the TIPS screen.
Started √A.