Most missions consisted of destroying enemy ships, but as simple as that sounds, it is probably the most intense aspect of the game.  Dog-fights (take those illegal thoughts out of your mind!) are handled with ease.  When an enemy speeds across the screen and out of your line of view, an arrow indicator appears to show you in what direction you should point your ship.  Getting close enough and engaging is good fun, but gaining the experience to climb the ranks and get more access to better ships is incentive enough to keep accepting missions.

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