Valve updated Proton Experimental on November 10, and the change that will matter most to a lot of handheld players is this Phantom Blade Zero Steam Deck news: video playback in the game is fixed when you are running at high resolutions.
S-GAME’s action RPG launched on 28 October and is already rated Playable on Steam Deck, but cutscenes and other in-game movies have been a sore point once the resolution goes up. The new Experimental build addresses that directly. It is a test branch, so you opt into it per title, and you can switch back if anything else misbehaves.
Phantom Blade Zero Steam Deck news: the high-resolution video fix
The official changelog is blunt about it: video playback in Phantom Blade Zero is fixed when using high resolutions. That is the whole note, and it is the one to grab if you have been watching intro movies or mid-game videos fail or glitch at higher settings.
Playable, in Valve’s terms, already means the game can be finished with some tweaks. The compatibility report still flags that the default configuration is not performant, that the first-time setup needs an active internet connection, and that the default controller layout, glyphs and on-screen text are otherwise in good shape. This Experimental update does not rewrite that rating, and it does not claim a performance boost. It is aimed at the video playback problem.
If you want a sense of how the game actually runs on handheld and living-room hardware, we have already looked at performance tweaks on the handheld and at settings for a smoother 60fps on Steam Machine. There is also the developer’s own November patch notes for Steam Machine, which is a separate game update, not this compatibility-layer fix.
Other Experimental fixes in the same build
The same November 10 changelog includes a handful of other fixes worth knowing about. Danganronpa V3: Killing Harmony is now listed as playable. AION 2 no longer crashes when you click the audio icon in the party info. Text to speech works in Overwatch again. ONE PIECE PIRATE WARRIORS 3 no longer has bad controller mappings when Steam Input is enabled. And some HID-using peripherals that could crash the input stack, leaving controllers unusable, have been fixed.
Steam Frame owners get a mention too. DARK SOULS II: Scholar of the First Sin was not playable on the headset, and that is now fixed in this Experimental build. As with the other entries, that comes straight from Valve’s changelog rather than from a new Frame software update.
How to try the test branch
Experimental is Valve’s moving test branch, so a later drop can fix one title and upset another. The notes you want are under the heading “Available in Proton Experimental (as of 2026-11-10)” in the official changelog. To try this video fix, open the game’s properties in Steam, go to Compatibility, tick the box to force a specific version and pick Proton Experimental. After it has installed, launch the game and give the movies a look at the resolution you actually play at, including any higher-than-default option you use on an external display. If a later build causes a new problem, you can switch back to your previous version from the same menu without touching the rest of your library.
That is the short version: high-resolution videos in Phantom Blade Zero should play properly on the current Experimental build, with a useful set of other game and input fixes sitting alongside it. The full list, dated 10 November 2026, lives in Valve’s official changelog.
