MW4 patch notes: October 29, 2026

A Multiplayer and DMZ fix update with one new addition: Possession, the Halloween party mode, joins the #MW4 playlist. Infinity Ward’s announcement reads: “An all-new mode joins the #MW4 playlist just in time for Halloween! Possession is live. Check out how it works and jump in!”

Possession arrived as a pre-season mode ahead of Season 1. The Season 1 announcement confirms its October 29 pre-season date and the full rules: in Possession you eliminate an enemy to possess them, transmigrating to their location and stealing their Loadout. Eliminating enemies lets you fly across the map to get on the Hardpoint or to clear a Search and Destroy bombsite, but as the Season 1 announcement puts it, “you’ll always possess an eliminated enemy, so check your targets before committing to the kill”. The playlists page lists it alongside the rest of the rotation.

The rest of this update is fixes and one economy change. Two of the entries are worth calling out because they change how the game plays rather than just how it looks. The XP earn rates were raised across several Multiplayer modes, following the Search and Destroy and Collateral increase that landed on October 25, and the DMZ economy was adjusted upward — cash rewards rose for Dynamic Ops, Side Ops and Story Mission replays.

October 29, 2026

A Multiplayer and DMZ fix update. Possession joined the rotation as a Halloween addition. See the playlists page for the current playlist list.

PLAYLIST

• Possession (NEW) — Halloween Party Mode. An all-new mode joins the #MW4 playlist just in time for Halloween. Infinity Ward’s own announcement: “Possession is live. Check out how it works and jump in!”

GLOBAL

Stability

• Fixed several stability and crash issues across all modes.

UI/UX

• The Calling Card menu no longer hides unlock requirements after they have been completed.
• The Cash Gathered as HVT stat was formatted incorrectly in the After Action Report for Inflation.
• Expanding or collapsing the Quick Nav menu in the DMZ FOB could cause the Progression Track to scroll unexpectedly.
• Players could not select a Free Loadout when their Stash was full, even if their Active Duty Operator had no equipment.
• A white flash could appear when navigating between Multiplayer menus.

MULTIPLAYER

• Increased XP earn rates across several Multiplayer modes to improve consistency in progression.
• Removed distracting overhead VFX on Lithium that could interfere with gameplay.
• Concussion Grenades could incorrectly display a red damage indicator around the edges of the screen.
• A non-functional Time Remaining indicator incorrectly appeared on the Scoreboard in Domination.
• On Silkworm, players could deploy the Recon Drone out of bounds.
• Removed redundant enemy location callouts on Shipment — “Y’all know enemies are at the Containers.”
• Fixed some out of bounds exploits on Mumbai.

DMZ

• Slight economy adjustment: increased cash rewarded for Dynamic Ops, Side Ops and Story Mission replays.
• Closed several exploits.
• Certain actions taken by squadmates were not counting toward DMZ Mastery Camo Challenge progression.
• The Scavenger could detect players immediately upon deployment.
• Players could not pick up a hostage after assimilating.
• The interaction prompt could sometimes be missing from Lieutenant Towers during Side Operations.
• Players could extract with a disconnected teammate’s Dog Tag and store it in their Dog Tag Case.
• The Encrypted Voice Logs would not spawn consistently as part of the Ears Everywhere DMZ Order.
• Enemy helicopters could crash into the Exfil helicopter and eliminate players during extraction.
• Fixed some terrain where players could become stuck on Hajin.
• Multiple vehicles could overlap near the edge of Hajin.

Two of these overlap with fixes in the October 24 section of the launch-week notes, so the DMZ map was still being worked on across the launch week. Hajin appears on both dates: October 24 fixed “even more areas where players could become stuck in rocks”, and October 29 fixed further terrain plus overlapping vehicles near the map edge. The Exfil helicopter also appears twice, but for two different bugs — on October 24 it was “the Exfil helicopter could disappear while players were still inside”, and on October 29 it was enemy helicopters crashing into it and eliminating players during extraction.

RECENTLY UPDATED

• A fix for players not receiving the 3-Plate Armor Vest reward upon reaching DMZ Level 37 was released. It granted the reward to players who had not yet reached level 37, but did not grant it to players who had already passed the level. Infinity Ward is working on delivering the item to players who earned the reward before the fix.

Sources

• Infinity Ward: MW4 launch patch notes, October 29, 2026 section, checked October 30, 2026.
• MW4 playlists for the current playlist list.
• October 30, 2026 patch notes — the DMZ cash figures this update left unpublished.