A team-based adversarial storytelling game for five people
From the introduction:
In this game, a human community will become the site of a battle between chthonic Brain Bugs and Cyber Minds from the stars. Both of them will occupy hapless humans, and control their every action. The victor will be the side that can possess the humans that are placed highest in the hierarchy.
Meanwhile, the humans are trying to figure out what is going on. If they ever find out, they are sure to do everything in their power to fight the intruders.