n Cthulhu: The Cosmic Abyss, you take on the role of Noah, an agent of Ancile, a secret Interpol division specializing in occult cases, as he investigates the mysterious disappearance of miners in the depths of the Pacific Ocean. His quest will lead him toyo the labyrinthine prison of R’lyeh, an ancient sunken city where Cthulhu is imprisoned. Alongside his AI companion Key, Noah must solve complex puzzles, make choices that will shape his fate, and resist the mind-corrupting influence of Cthulhu.