This is actually four games in one: Four Straight - 3-D Tic-Toe variant for up to 4 people. Indicates no tie ever on record ;-) Triple Check: a 3-D checkers variant. For 2 players. Space Pirate: A 3-D chase game - evidently similar to farmer and the Pig. For 2 players. Space Chess: This really is the rules only as it states in the rules that the chess pieces are not included. The board consists of 4 clear plastic shelves of 4 levels. There are marbles that sit in holes of these shelves in 4 colors. Quite hard to find. Contents: Rule sheet 4 plastic planar levels 12 columns to insert into planar levels 30 marbles in each of two colors 18 marbles in each of an additional two colors