Full list of all 9 Dark Siren achievements.
The base game contains 7 achievements, and there are 2 DLC packs containing 2 achievements.
First encounter with Dark Siren.
captured by the Dark Siren.
opened the locked door.
Complete the normal ending
unlocked the skin and change the skin.
Complete the true ending
Complete the Extra ending
Two Sirens, double the joy... no, double the difficulty.
I was trampled by the giant siren's feet.