Activision frequently runs limited-time "Free Access" events, often around new season launches. During these periods, you can download a trial version from the PlayStation Store , Xbox Store , or Battle.net that typically includes a selection of Multiplayer maps and the full Zombies mode.

This standalone battle royale mode is entirely free-to-play and shares the same launcher as MW3.

Discover more. Call of Duty®: Warzone™ 4.3. Shooter. Free. Call of Duty®: Black Ops 6 - Standard Edition (Windows) 2.6. Shooter. $ Microsoft Store Call of Duty: Modern Warfare III Installation and Setup

If you plan to download the game during a free trial or via Game Pass, ensure your PC meets these minimum specs: Call of Duty® - Free download and play on Windows

There are a few ways you can occasionally play portions of the game without buying it:

If you have an active Xbox Game Pass Ultimate subscription, the game is included as part of the service, meaning you don't have to purchase it separately. PC System Requirements