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