A science facility called the Nexus institute that experiments on humans, to test their limits and “improve” them by adding animal like or robotic modifications and others like extra limbs, eyes and heightened senses. Each human is kept in a white cell and assigned a scientist who experiments and monitors them. Modifications are done by surgery or injections. The experiments done on the humans is called the Prometheus Project. They believe they are doing good even if it's unethical. Cruel.