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