The Fifth Expedition

In the 100 years after the end of the world, the survivors and their descendants have settled in and around old, but still functional, production facilities for food and shelter. When one of these ancient machines breaks down, the community that had settled around it sends out expeditions into the unexplored depths of the facility to try and bring it to life again. The first 4 of these expeditions have never been heard from again, and the machine continues to stay silent. Now, with barely any ma...