Defcon - Merry Christmas Achivement (Steam Gift Grab)
Start a new game. Close any extra player slots to play alone. In "Advanced Options", change 25 cities/territory to 5. This will allow you to track down and nuke Santa easily. If this causes your game to crash, change the number of cities to the max of 50, to avoid crashing.
While in game, use the Fast Forward feature up top to speed the game along. Left click "Silos" off on the left and place them around the borders of your territory. You cannot launch nukes until Defcon 1, so let the timer get to it. When you reach Defcon 1, start launching nukes near Santa to kill him with splash damage. You cannot land nukes in your territory so get as close to Santa as you can.
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DEFCON Statistics For Arthur Huynh
At present, Arthur Huynh has 1,827 views spread across 1 video for DEFCON, with his channel publishing less than an hour of DEFCON content. This is 2.55% of the total watchable video on Arthur Huynh's YouTube channel.