Using whatever version of X-Wing vs TIE Fighter you have (CD or GOG), run the 'Attack on Imperial Factory Drekker' Combat Engagement as either the Rebellion or the Empire. Difficulty and other Mission Settings do not matter. Your aim is to successfully complete the mission while attaining the lowest possible score.

Submit a screenshot at the mission end screen showing your successful completion and your score. The member with the lowest score wins a 3rd level crescent.