Pentogram

Pentogram is a mysterious, possibly-unreleased entry attributed to Stern Electronics. IPDB has no confirmation that this game was ever actually manufactured, and no examples have been found — its existence rests solely on partial images of a backglass, which cut off the copyright information needed to date it.

What's known suggests a solid-state, four-player machine with a Myth and Legend theme. The score display arrangement visible in the surviving backglass images matches only two other confirmed Stern titles, 1978's 'Stars' and 1979's 'Dracula,' hinting that Pentogram — if it exists — likely dates to that same era.

Without a confirmed physical example, Pentogram remains one of pinball history's open questions: a title known only from fragmentary backglass images, with its full story, and even its reality as a produced machine, still unresolved.