polybius — pulled this off an old coin-op mailing list, draw your own conclusions

transcribing an old post from a coin-op collectors list (formatting was trash, cleaned it up). guy claims that around 1981 a few suburbs of portland oregon had this black cabinet, no marquee art, just 'POLYBIUS' and a logo, vector-ish puzzle/shooter. kids who played got headaches, night terrors, one……