Full list of all 9 Dark Siren achievements.
The base game contains 7 achievements, and there are 2 DLC packs containing 2 achievements.
captured by the Dark Siren.
unlocked the skin and change the skin.
Complete the normal ending
opened the locked door.
First encounter with Dark Siren.
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.