XOW · tic-tac-toe in four dimensions

81 cells, 272 lines, two colours and a beating tesseract. Tic-tac-toe taken to a 3×3×3×3 board you spin with a finger in 3D and in 4D, with a 16-bit look, five AI opponents and turn-based online games. Free, no ads, no sign-up.

https://xow.joseluissaorin.com