|Game(s)||Alone in the Dark: Illumination|
|Previous episode||Reflective Pond|
|Next episode||Silent Quarry (next chapter)|
Sonorous Sewers was the fourth and last level of the Beneath the Graves chapter in Alone in the Dark: Illumination. It succeeded the level, Reflective Pond. This level takes place in the secret hidden chamber underneath the glowing green water from the previous level, and that it features an area called Cthulhu's lair.
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