3 D OXO is based on the classic pen and paper game Noughts and Crosses. Instead of playing on one 3x3 grid though, the game has you trying to make a line of X's on a 4x4 cube. The aim is to beat the computer by placing X's and making a vertical, horizontal or diagonal line on the surface or through the cube. Each side of the cube is shown on the screen and the keyboard is used to place your X's. This was published in the "75 Spill Datatronic" compilation.