However, there must also be a clear path between the tiles.The definition of a clear path is: you must be able to draw a line between the two tiles that have no more than two bends in it. The game will show you the path choosen after a valid match -- it won't take long to get the hang of it.RuniX includes several variations on the basic game as well as many different and lovely sets of runes. Changing to a new game variant will alter the rules of the game. Changing to a new tile set will alter the difficulty of matching the runes. The combination of game world and rune set makes for dozens of different combinations.