Call of Duty's DMZ Is Back — Switch 2 In, Steam Deck Out

Seventy levels of progression, a walkable Forward Operating Base, a 3D printer, and the largest AI population Infinity Ward says it has ever built. DMZ is not a side mode in Modern Warfare 4 — it’s a second game bolted onto the October 23 launch, complete with its own economy of cash and crafting materials that persists between raids, and all of it sharing weapon progression with multiplayer and Warzone.

It’s also, for handheld players, two very different stories depending on which device you own. Switch 2 gets a native build on day one alongside PC, PS5 and Xbox Series X/S. The Steam Deck, almost certainly, does not.

Ricochet Still Doesn’t Do SteamOS — and Nothing Here Changes That

Modern Warfare 2, Modern Warfare 3 and Warzone have all been absent from Steam Deck, and the reason has never been horsepower. Ricochet, Activision’s anti-cheat, leans on a kernel-level driver that doesn’t support Linux or Proton, which means Valve’s compatibility layer can’t carry it — the game simply won’t launch. The DMZ blog post and developer diary make no mention of SteamOS support for Modern Warfare 4, and there’s no signal that the calculus has shifted. Older entries only run on Deck at all through community compatibility work like the DXVK fix that got Ghosts booting, which is no help against a kernel-level anti-cheat. Until Activision says otherwise, treat DMZ on Deck as a no.

Windows handhelds are a different proposition. The ROG Ally, Legion Go and MSI Claw run Windows 11 with Secure Boot and TPM 2.0 enabled, which is exactly the environment Ricochet wants to see, so expect them to run MW4 and DMZ. What’s missing is any disclosed performance target below console: Infinity Ward hasn’t published resolution or frame-rate goals for handheld-class hardware, so how far you’ll have to drop settings to hold a stable frame rate is genuinely unknown rather than merely unannounced.

A Raid You Can’t Pause: DMZ Fights the Handheld Session

Extraction shooters are the most handheld-hostile genre in the medium, and it’s structural rather than incidental. A run in Haijin means carrying in gear you’ve earned, fighting four tiers of AI aggression plus other players, and extracting alive to keep it. Drop out mid-raid — because your train arrives, your hotspot hiccups, or the battery gives out two hours into a long-haul flight — and the stash you brought in is gone. Suspend/resume is the single best thing about portable play, and DMZ is built to punish exactly that behaviour.

There’s a partial counterweight in Infinity Ward’s own framing. Calling DMZ an “action extraction shooter” and designing the interface around clear icons and fast navigation is a tacit admission that the genre’s menu-drudgery is a barrier. Shorter looting loops and a deployment screen that lets you pick a mission type before you load both shave minutes off a run — real value on a device you’re playing in 30-minute windows. It doesn’t make DMZ a commuter game. It does make it a slightly less punishing one.

The Switch 2 Build Has to Fit Inside 256GB

Switch 2 is the only genuinely handheld platform with a confirmed DMZ at launch, and that raises the least glamorous question in the entire reveal: storage. The console ships with 256GB of internal space, expandable via microSD Express. Call of Duty install sizes have been the franchise’s running joke for years — the Modern Warfare 2 era routinely demanded well over 100GB once Warzone was folded in — and DMZ adds a full map, its own progression track, and the densest AI population Infinity Ward has built. Shared weapon progression with multiplayer and Warzone is great news for players and bad news for anyone hoping the modes stay cleanly separable on disk.

Performance is the other unknown. Neither Infinity Ward nor Activision has disclosed resolution or frame-rate targets for the Switch 2 version, and a mode built around dense AI encounters is the hardest possible thing to scale down — that’s CPU-bound work, not something you fix by dropping texture quality. If DMZ is part of your reason for buying the hardware, wait for launch-week technical breakdowns rather than the trailer.