Advance Wars: Days of Ruin is a 2008 turn-based strategy game developed by Intelligent Systems for the Nintendo DS. The game is the third installment in the Advance Wars series.

Meteors have struck the Earth, turning it into a post-apocalypic wasteland, and the survivors are left to fight over the remaining resources. Will, a young boy, is rescued by the Rabinelle army, and taken with them as they travel across the land. They encounter various bandits, soldiers and politicians who try and eliminate them.

Advance Wars: Days of Ruin is a tactical/turn-based strategy game, in which you control an army of 2D military forces from a top-down view. When it's your turn, you select individual units (ground, sea or air) and move them across the grid to attack, harvest resources, and other actions. Each unit has the ability to level up while in battle, which imbues that unit with more advantages. In addition to normal units, you are also given control of COs (Commanding Officers), which have powerful special abilities, such as healing all allies, damaging all foes, or altering the weather. You can win a battle by either eliminating each of your enemy's units, or by capturing their headquarters. The main single player campaign consists of 26 main missions, as well as 38 training missions that are unlocked as you play the game.

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