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
Completed Erin route
Completed all endings
Read mini story 3
Completed Gavin route
Completed Tobias route
Read mini story 4
Completed Aran route
Read mini story 2
Read mini story 1
Completed Simon route
Reached a Good ending
Defeated the dragon
Reached a Bad 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