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