Ad Infernum

You wake up stranded in a desert gas station after a car accident that left you severely injured. You hear a voice calling out on the radio, trapped near you but just out-of-reach. You and your partner discover the remnants of an ancient cult. They also uncover unholy rituals in a cavern. And bloodthirsty monsters are hunting you down. Can you complete the final ritual of the cultists before the walls close in?