Columns 97 Sega STV Cartridge. An updated version of the classic puzzle game, for Sega's ST-V hardware. Coloured jewel blocks fall in random order. The object of the game is to arrange the jewels vertically, horizontally or diagonally in rows of three or more to make them disappear. During gameplay as you build up points, the game speeds up, making it harder for the player. Special flashing jewel blocks appear sporadically which will make all jewels of a certain colour disappear.