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