Here is the full list of all 13 Symphonic Rain achievements.
Played "Even if Tears Run Down Your Cheeks" (Phorni ver.) in free play mode
Saw every ending.
Saw Arie's ending.
Saw Torta's other good ending.
Saw Torta's true ending.
Saw Fal's bad ending.
Saw Fal's good ending.
Saw three endings to unlock the "al fine" route.
Saw Lise's bad ending.
Saw Lise's good ending.
Saw the normal bad ending.
Saw Torta's good ending.
Saw the opening movie during gameplay.