The object of the game is to control the most number of Space Craft at the end of the game. On your go you roll 2 dice, add them together, and place your Space Craft on the corresponding space on the board, if it is not already occupied. If you roll a 7 you occupy the Moon with your large Moon Base token, this allows you to control the other Space Craft. While occupying the moon you may replace any of your opponent's pieces with a piece of your own colour, provided that you roll the correct number. When all the areas numbered 2 to 12 are occupied the game ends and the player with the greater number of his colour markers is the winner.