Ad Infernum

After experiencing a devastating car crash in the middle of the desert, you awaken stranded at a long-abandoned gas station. A voice on the radio calls out to you, trapped nearby but just out of reach. Together you discover remnants of a missing cult, unholy rituals, a mysterious cavern, and bloodthirsty creatures hunting you both down. With the walls closing in, can you follow in the cultist's footsteps and complete their final ritual -- before it's too late?