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