Since August 28, 2026 at 10:00 AM PT, the Open Beta for Call of Duty: Modern Warfare 4 is accessible to everyone – no pre-order required. After the early-access window from August 21–25 reserved for pre-purchasers, Activision now throws the doors wide open on Xbox Series X|S, PlayStation 5, PC (Battle.net & Steam), and, as a genuine surprise, the Nintendo Switch 2. The full launch is set for October 23, 2026, developed by Treyarch and Raven Software.
The beta ships with twelve brand-new multiplayer maps that blend classic three-lane design with verticality and destructible environments. A standout feature: crossplay and cross-progression work across all platforms – Switch 2 included, marking a historic first for a mainline Call of Duty on Nintendo hardware. The developers stress that feedback from this weekend feeds directly into the day-one patch. Players who pre-loaded (available since August 21) jumped straight in; everyone else downloads roughly 45–60 GB depending on platform.
On the technical side, there's a catch: PC players report frequent micro-stutters when Nvidia's ShadowPlay / GeForce Experience overlay is enabled. A workaround is disabling the in-game overlay or switching to the Windows Game Bar (Win+G). Activision and Nvidia are reportedly working on a hotfix. Meanwhile, early Switch 2 impressions show a solid 60 fps docked, albeit with reduced texture resolution and slightly shortened draw distance – an expected compromise for hybrid hardware.
For the community, this beta weekend (runs until September 1, 10:00 AM PT) is the last major chance to stress-test weapon balance, spawn logic, and the new movement system (Tactical Sprint 2.0, improved mantling) under live conditions. Ranking up unlocks cosmetic rewards – calling cards, weapon camos, an operator skin – that carry over to the full release. Whether Modern Warfare 4 can redeem the franchise after mixed receptions to its predecessors will be decided now – and the nerd community is watching closely.