Call of Duty: Modern Warfare 2 has three different game modes: Campaign, Spec Ops, and Multiplayer. Campaign is a single-player mode where the player completes eighteen levels connected by an overarching plot.
Modern Warfare II's singleplayer campaign requires a persistent internet connection. Why on Earth does Call of Duty: Modern Warfare II (2024)'s SINGLEPLAYER campaign require a persistent internet connection to play if you're only playing by yourself?