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
Completed all endings
Completed Aran route
Read mini story 3
Completed Tobias route
Reached a Bad ending
Completed Gavin route
Read mini story 2
Read mini story 1
Completed Simon route
Defeated the dragon
Completed Erin route
Reached a Good ending
Took part in the festival celebration
Was reminded of the old fairytale
Uncovered Adale's treachery
Was reunited with Simon
Found the town hidden in the mountains