Jack traveled through the galaxy encountered an armada of alien ships that moved toward the planet Earth. It turned out to be an advanced squad of aliens who wants to capture our planet. Now in the game Space Big Gun your character will need to break through their system and inform his leadership about the attack. To do this, your character will bravely direct his ship through the enemy's formation. It will fire from all the guns and you will steer clear of the ship from under fire. Of course, lead the fire to defeat and shoot down the enemy. Sometimes they can drop out various items that you will need to collect.