Activision Publishing today announced that Call of Duty: Modern Warfare 3, the third installment in the Modern Warfare series developed by Infinity Ward and Sledgehammer Games, is now available at retail worldwide, for PC, Xbox 360 and PS3. Modern Warfare 3 delivers a single-player campaign that picks up immediately following the events of Call of Duty: Modern Warfare 2 and escalates into World War 3, as well as upgrades to Special Ops like the all-new Survival Mode. The multiplayer features visceral gun-on-gun combat, a revamped pointstreak system with the introduction of "Strike Packages", new modes like "Kill Confirmed", and other gameplay enhancements, new features and a bevy of new weapons, equipment, and perks. The Wii version of the game (developed by Treyarch) is also available, together with Call of Duty: Modern Warfare 3: Defiance for the Nintendo DS, developed exclusively for the platform by n-Space. Press 'read more' for details.