EASY DEFENDER OF THE CASTLE -- Before the mission, go buy the maxium amount of marbles...Then, during the mission, after they break through the barricades, and you are running back to the Observatory, STOP and spread all the marbles on the paved portion BETWEEN the 2 stone pillars that the Jocks will come through...Then run up and man the spud gun...They will all slip and fall, making them real EASY targets.....