Polybius, a mysterious arcade game rumored to be built by government agents

Here's what we know. In 1981, two children in Portland, Oregon, suddenly grew mysteriously ill one week after visiting a local arcade. Soon after, a professional video game player died in a sudden accident while at an arcade, and later, his greatest rival suffered the same fate. A conspiracy theory quickly caught on: these four were the victims of a government mind-control theory centered on a one-of-a-kind arcade game known only as "Polybius". Okay, we'll bite.