I’ve never heard of this game, so I’m particularly interested in how it played. Unfortunately, the article still leaves some questions unanswered.
And it’s clarified with “As a social experience had it been released in 1986, this would have been the grandfather to games like Fortnight; a multiplayer PvP battle arena where each player was supposed to have their own dedicated set of controls and display.”
But they did say "a four-player game that was said to resemble Sinistar" but it would have been more accurate to have said "it's literally a 4-player version of Sinistar" and I would have had zero remaining questions.