You need an Internet connection to initially download content. Once Modern Warfare Remastered has been downloaded, you do not need to be connected to the Internet to play/launch the Single Player Campaign or play Multiplayer locally. Will Call of Duty: Modern Warfare Remastered come as a separate disc?

Call of Duty: Modern Warfare 3 can be played on PlayStation 5, PlayStation 4, Xbox Series S|X, Xbox One, and PC.