From the back of the box: GET TO CRYSTAL CITY BEFORE THE ROBOTS TAKE OVER A landing party from the starship "Aurora" beams down to explore an uncharted planet in search of provisions. The spacemen meet unfriendly robots who move about trying to keep the "invaders" from entering Crystal City. But the spacemen need supplies, so they plot thier course over the alien surface in a bid to occupy Crystal City before the robots can take over their landing site. * * User Summary: In Star Block, each player controls five pieces, either spacemen or robots. The two forces start on opposite sides of a board consisting of forty-four pentagon-shaped spaces. The object is to be the first player to occupy all five spaces of the opponent's starting row. Pieces may neither be captured nor jumped; however, pieces may be blocked (hence the name of the game).