While the full retail version of the game is generally a paid title, there are official ways to try or play the franchise for free:
Players can download a free trial version (demo) of the original game to experience a sample of the campaign.
The standalone free-to-play battle royale, Call of Duty: Warzone , offers large-scale combat without requiring a purchase. Buying the Game Legally
If you want the full experience, including the legendary campaign and active multiplayer servers, you can purchase it through official platforms: Call of Duty® 4: Modern Warfare® (2007) on Steam
