In Carrion, players inhabit the role of a mysterious gelatinous entity trapped within a corporate research compound operated by Relith Science, experiencing the sprawling facility from the perspective of its captive rather than its captors. Upon breaking free from confinement, the creature must navigate through the labyrinthine corridors and ventilation systems while confronting the scientists and armed personnel determined to recapture or eliminate it. As the being hunts its way through the installation, consuming those who oppose it grants the creature access to fragmented pieces of its own genetic material, unlocking extraordinary new powers and abilities previously stripped away. Through this progression of reclaimed capacities and environmental clues scattered throughout the complex, the monster gradually reconstructs its past and discovers the circumstances that led to its initial capture.