Qubic, or 3D Tic Tac Toe, has been in publication by multiple game companies since the 1940s. The idea is similar to Connect Four, except in three instead of two dimensions. This adds additional complexity and makes the game much more of a head scratcher than Connect Four (and certainly vastly more complex than actual Tic Tac Toe.) The game can be played by up to six players but works best with 2 or 3.
Here is a link to the Board Game Geek review page:
https://boardgamegeek.com/boardgame/13714/qubic
And here are the condition notes:
Good used condition. All elements are present and in good, very lightly used condition. The markers look like they might never have been removed from the box. The four-tier board is made from plastic and all elements are present, clean, and intact -- no scratching, no breaks or cracks. Box shows moderate shelf wear but is intact and shows decently. See photos for details.