Strategic board game with 88 glass marbles in three game variations The Aim To make a line out of marbles of your colour. The Rules Marbles are brought into play by sliding them onto the board from any one of its edges. Any marbles that are already there are simply pushed one space further along; however no marbles may fall off the other side of the board. Game variations In the game variations Shiftago Expert and Extreme, marbles can be removed from lines that have already been formed! This creates spaces along with new possibilities – but also new dangers.