Here is the full list of all 12 DEVIL BLADE REBOOT achievements.
Clear Easy Mode (REBOOT)
Clear Normal Mode (REBOOT)
Clear Hard Mode (REBOOT)
Start Retro Mode
Clear Normal Mode (RETRO)
Clear Hard Mode (RETRO)
Unlock all Gallery content
Unlock 100%
Play for 5 hours
Clear the game 10 times
Earn 100 medals
Achieve a total score of 100,000,000