Well, not really. It's said to be a game, that came out long ago. A game that existed at the same time as pong, but keeps being forcibly forgotten on the internet. ROMs that get posted, people talking about what their Zampanio playthrough was like, it all gets deleted. But the truth is that it never existed.
What I've learned from looking at the Farrago Fiction website, and reading the explanations on the various ZampanioQuiz pages, is that Zampanio doesn't exist. And it never did. The point of Zampanio is not to find the real game, but to invent a fake game that in turn becomes the real game. When that fake game is created, you then present it as the real game, and everyone accepts it. Because Zampanio is both everything that everyone says it is, and exactly what you think. It's hard to explain, and this may be completely unintelligible. To understand what makes Zampanio exist, you need to accept that Zampanio, as it is known, does not exist, and never did. The essence of Zampanio is pretending to play a game and convincing everyone around you and yourself that it's real.