The headline change in Modern Warfare 4's Beta isn't a new map or mode. It's a rework of how Create-a-Class works: Operators are now tied to individual loadouts instead of being a separate cosmetic pick, letting players build and save up to 12 distinct Custom Loadouts, each with its own Operator attached.

That sounds like a small UI tweak, but it changes how players actually prep for a match. Previously, switching load styles meant digging back through weapon and equipment menus while the Operator stayed a separate, unrelated choice. Now a loadout is a complete package, weapon, perks, killstreaks, and Operator skin bundled together and swappable in one selection. Infinity Ward is pairing the change with two new systems: Apex Attachments, which unlock powerful weapon effects on fully-leveled guns without eating an attachment slot, and Gunny, a build assistant that recommends setups from attachments a player has already unlocked.

Where the Beta actually stands right now

Modern Warfare 4's Early Access Beta ran August 22 through the morning of August 25 for players who pre-ordered on Xbox Series X|S, PlayStation 5, and PC. The Open Beta picks up August 28 through September 2 for everyone, including Nintendo Switch 2 for the first time, with a level cap that rises from 20 to 30 and unlocks the rest of the Beta's weapons, perks, and reward track. Weekend One offered 21 Operators, six multiplayer modes including the new elimination-focused Inflation, five core 6v6 maps, and Kill Block, a map that physically reconfigures itself every two rounds.

Weekend Two adds a genuine surprise for a Beta: Call of Duty: Warzone Resurgence returns on a new map called Zodiac, giving players a battle royale mode alongside the usual multiplayer test. It's a heavier addition than most Betas bother with, since Resurgence content usually waits for a full seasonal launch rather than a pre-release test window.

The Beta also carries the PC hardware gate Activision confirmed earlier this month: TPM 2.0 and Secure Boot are required to play, and for the first time, a single-player Campaign mission is playable inside the Beta itself rather than staying locked until launch. Both of those details already shipped as their own story; what's new this week is the mechanical rework underneath the multiplayer test.

Modern Warfare 4 launches worldwide October 23, with pre-order customers getting Campaign access a week early on October 16.