Advance Wars: Days of Ruin (USA) (Demo) (Kiosk) (Japanese title: デイズオブルイン) is a turn-based strategy game developed by Intelligent Systems and published by Nintendo. It is the fourth installment of the Advance Wars series, and the first to be released on the Nintendo DS. In the game, players take control of a group of soldiers who must battle against an enemy army in order to restore peace to a post-apocalyptic world. The game features a variety of different units, terrain, and weapons, as well as a 'Commanding Officer' system, which allows players to customize their troops and devise strategies. Additionally, there is a multiplayer mode which allows up to four players to compete against each other. Advance Wars: Days of Ruin is an engaging and challenging strategy game that offers hours of entertainment for all ages.