Each astronaut starts with a hand of 5 Game Cards which contain a mixture of Oxygen and Action Cards. On your turn, pick up a card from the Game card pile. Action cards allow you to attack other players by stealing precious Oxygen, moving them back a space or shielding yourself from other players attacks. You can then use your Oxygen cards to move forward through the dangerous void of space. Each time you move forward you reveal a space card which can help or harm you! Get back to the ship first to win, but remember to keep enough oxygen or you'll die.