Modern Warfare 4 Beta: What Happened During Early Access and What Changed

The supported platforms were:

• PlayStation 5
• Xbox Series X|S
• Xbox on PC
• Steam
• Battle.net

The schedule placed the beta immediately after the Call of Duty: NEXT presentation, giving early-access players the first public opportunity to test the new multiplayer build and the included campaign content.

What Infinity Ward changed during the first weekend

The clearest documented update focused on movement audio. Infinity Ward reduced both the distance at which enemy footsteps and gear sounds could be heard and their overall volume. The stated goal was to signal that an enemy was approaching without revealing that player’s precise position from far away.

The same update enabled map voting. Infinity Ward said four maps were needed for voting to work effectively, so it added Cachette to the rotation.

The available patch-note evidence does not support a detailed list of weapon-balance adjustments or bug fixes. Those changes should not be presented as confirmed unless a fuller patch-note record becomes available.

Campaign mission, maps, and multiplayer modes

The beta included the playable single-player campaign mission “Entrenched,” described as an exclusive campaign mission for the test.

The supplied official beta information identifies several multiplayer maps, including Cachette, Lithium, Lotus, Rooftops, and Transit 213. Other reporting lists additional maps and modes, but the available excerpts do not establish a single complete roster for every phase of the beta.

Reported early-access multiplayer modes included:

• Team Deathmatch
• Domination
• Hardpoint
• Kill Confirmed
• Search & Destroy
• Inflation
• 10v10
• 3v3
• Mobility Course

These details come from the supplied beta coverage, while the official patch notes specifically confirm Cachette’s addition and the resulting map-voting feature.

Open beta dates and Nintendo Switch 2 access

Weekend Two was scheduled for August 28 at 10:00 a.m. PT through September 1 at 10:00 a.m. PT. Unlike early access, the open beta did not require a pre-order and was intended to be available to all players.

Nintendo Switch 2 was scheduled to join the beta for the first time during this second weekend. The open-beta platform list included Xbox Series X|S, Xbox on PC, PS5, Steam, Battle.net, and Nintendo Switch 2.

The supplied evidence does not provide a reliable Switch 2 frame-rate, resolution, or other performance target. It is therefore not possible to make a source-backed performance promise for that version from this record.

What remains unconfirmed

Several claims associated with the beta launch are not established by the provided sources:

• Specific server-capacity failures on launch day
• Update-download or installation problems that blocked access
• A complete list of weapon-balance changes
• A complete list of bug fixes
• Definitive confirmation of whether Warzone or DMZ was included or excluded in each beta phase
• A fully verified list of all open-beta additions

Some third-party reports describe broader content, including Warzone and additional maps or modes, but those accounts conflict with other material in the supplied record. The safer conclusion is that the beta schedule, platform access, “Entrenched” mission, Cachette addition, map voting, and footstep-audio changes are confirmed; the disputed details require stronger or more specific official documentation.

The practical takeaway

For players trying to decide when they could participate, the key distinction was access: pre-order or redeem a code for August 21–25, or wait for the open beta on August 28–September 1 with no pre-order requirement. Switch 2 players had to wait for the second weekend.

For players evaluating Infinity Ward’s response to feedback, the documented first-weekend changes addressed two immediate multiplayer concerns—overly revealing movement audio and the lack of map voting. Broader claims about servers, weapon balance, bugs, Warzone, DMZ, Switch 2 performance, and the reported October 23, 2026 full release date are not fully verified by the evidence supplied here.