The Open Beta for Call of Duty: Modern Warfare 4 arrives with an Early Access period starting August 21 and running through August 25. This initial phase is limited to players with early access. Following that, Weekend Two of the Open Beta opens to all players on all platforms, including Nintendo Switch 2, from August 28 to September 1. No preorder is required for the second weekend, allowing broad participation ahead of the full game release. This beta offers a chance to experience new multiplayer content and gameplay improvements.
- Early Access Beta: August 21–25
- Open Beta for all players: August 28–September 1, all platforms including Nintendo Switch 2