Time Vectors™ is a Tic-tac-toe style game, but it is a four-dimensional game of four-in-a-row. The board is a 4×4×4×4 matrix on four vertical levels. The game board is constructed of a nice hardwood base and supports, and the playing surfaces are printed clear acrylic boards. Some have described Time Vectors as "Tic-tac-toe on steroids." So far in fifteen years of private play, no algorithm has evolved for producing a sure win or tie game for the first player, as happens with most Tic-tac-toe style games.