In 'Mouths in the Dark', you play as Cassie, a quirky scientist who has accidentally fused her consciousness with a flatworm while experimenting with ion channels. As you navigate a surreal, ever-shifting world filled with bizarre creatures and mind-bending puzzles, you must uncover the secrets of the flatworm cellular structure to reverse the mishap. Combat other mutated organisms, explore your unique abilities, and interact with eccentric characters who both help and hinder your quest. The choices you make will determine the fate of your consciousness and the survival of the creature that shares your journey.