Call of Duty: Modern Warfare 3: Defiance for Nintendo DS is a first-person shooter that complements the console version of MW3. Developed by n-Space, the game offers a unique campaign set within the same universe but with different missions. Players engage in intense warfare, taking on the roles of various military operatives, and face off against a new threat as part of a global conflict. The DS version includes a variety of weapons and equipment, multiplayer modes, and supports the handheld's dual screens for gameplay and navigation.