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No one has come forward to say they have played Polybius.
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Naturally, doing this for extended periods would make some players sick. In the early eighties, when the old arcade business was in rude health, it was not unheard of that some customers would frequent arcade machines and stay for hours trying to bathe themselves with the fame of high scores. There were local reports at the time of FBI agents visiting arcades, though this was apparently due to an investigation into illegal gambling rings. The origin of this story remains a mystery, but one theory is that it's a cocktail of different truths, mixed together to create a far more interesting tale. Months after they were installed, the legend goes, both machines disappeared. Agents dressed in black were said to have frequented the arcades in Portland, apparently to download data stored on each cabinet.
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Those who played the game apparently experienced headaches, nausea, and nightmares, while in some accounts of this story, such side-effects were followed by suicidal thoughts. According to the earliest accounts of the story, only two Polybius machines were ever built, and were installed at separate arcades across Portland, Oregon. This story has circulated online since the mid-to-late-nineties and curiously, unlike most myths, its details have not been embellished in the two decades since. Possibly the most alluring of all video game urban legends is the story of Polybius, an arcade cabinet apparently built by the US military, or perhaps the CIA, in 1981.