The Windows table came from a larger game

The familiar Space Cadet pinball table was not created just for Windows. It came from Full Tilt! Pinball, a separately sold game that offered three tables. Windows included Space Cadet on its own, so players got a complete, playable table—but not the full collection.

That made the Windows version function much like a demo: it let people experience one part of the paid game without buying it.

A showcase that worked as a game

Space Cadet was more than a bare sample. Its missions, targets, and animated sci-fi setting gave the table enough variety to stand on its own. A Windows user could simply launch it for a quick game, while anyone who wanted different tables had a reason to seek out Full Tilt!.

So “an ad” is a useful shorthand, not the whole story: Windows Pinball was also a real game in its own right. Its cleverness was that the promotional sample was fun enough to keep playing even if you never bought the rest.