While is not a permanently free game, there are specific ways to access it without a direct purchase depending on your platform or subscription service. How to Get Modern Warfare 2 Campaign Remastered
: While the Campaign Remastered itself requires payment or a specific subscription, the standalone Call of Duty: Warzone is free-to-play and shares assets and engines with the modern Modern Warfare series. Installation Guide by Platform
: The game was previously offered as a free monthly title for PlayStation Plus members. If you claimed it during its promotional window (such as August 2020), you can redownload it for free anytime as long as your membership is active.
: For those who don't have it via subscription, it is available as a digital-only title on the PlayStation Store, Xbox Store, and Battle.net for PC .