Here is the full list of all 19 Blue Rose achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Read mini story 5
Read mini story 4
Read mini story 3
Read mini story 2
Read mini story 1
Completed all endings
Completed Aran route
Completed Simon route
Completed Gavin route
Completed Erin route
Was reminded of the old fairytale
Reached a Bad ending
Reached a Good ending
Completed Tobias route
Was reunited with Simon
Found the town hidden in the mountains
Defeated the dragon
Took part in the festival celebration
Uncovered Adale's treachery