The cabinet appeared without announcement sometime in the summer of 1981, wedged between a Centipede machine and a broken Defender unit in a Portland, Oregon arcade on SW Morrison Street. Nobody remembered it being delivered. Nobody signed for it. It was simply there one morning when the owner unlocked the doors — black, featureless except for the title rendered in stark green-on-black: POLYBIUS.
The game itself was difficult to describe to anyone who hadn't played it. Those who tried said it was like Tempest crossed with something that had no name. Geometric shapes that almost resolved into faces. Tunnel sequences that seemed to breathe. A score counter that climbed into numbers no arcade game had any reason to reach. Players reported that time moved differently when they were at the cabinet — what felt like five minutes was sometimes an hour, and what felt like an hour sometimes resolved into mere seconds.
Within days, the line for Polybius stretched out the door.
What followed was documented in fragments: police reports, hospital admissions, the recollections of bystanders who watched and never played. A 16-year-old named Tommy Gibbons was brought to Providence Hospital after a grand mal seizure while playing; his parents reported that he had no prior history of epilepsy. A 19-year-old arcade regular went home after an eight-hour session and told his roommate he couldn't remember his mother's name, then sat down and didn't speak again for three days. A group of friends who played in a round-robin tournament described shared nightmares that followed identical scripts — a green corridor, a door at the end, a voice asking if they wanted to continue.
But the strangest reports were about the men.
Multiple witnesses — the arcade owner, a regular named Carl DeSantis, a teenager who refused to give her name to the newspaper — described seeing men in black suits arrive at the arcade in the late evening hours, sometimes past closing, with their own key. They did not play the game. They opened a panel on the back of the cabinet and removed what appeared to be a reel of magnetic tape or a data cartridge. They spoke to no one. They were gone before anyone thought to follow.
The owner of the arcade, when pressed, claimed he had no idea who the men were or how they had a key. He seemed frightened. He changed the subject.
Polybius vanished approximately six weeks after it arrived. One morning it simply was not there. No delivery truck was seen. No paperwork. The spot where it had stood showed scuff marks on the linoleum and nothing else.
In the years since, researchers have attempted to locate any surviving unit, any manufacturing records, any government documentation linking the machine to a behavioral research program. FOIA requests have returned nothing. Arcade game historians note that no manufacturer by the name on the cabinet — reportedly "Sinneslöschen," German for sense deletion — has ever been verified to exist.
What the game was collecting, and for whom, has never been established.
Some survivors of those six weeks still report the nightmares. A tunnel, lit in green. A door. A voice.
Do you want to continue?
There is never a coin slot in the dream. The game plays for free.