Valve is executing one of the most ambitious strategies in recent software history. While Microsoft tries to convince the world that Windows on ARM is ready and Qualcomm promises raw powerGabe Newell’s company has taken a shortcut: Instead of waiting for developers to port its games, it’s funding the technology that makes that unnecessary. You want your Steam library to work on any device without anyone having to lift a finger.
The precedent: Proton. To understand the magnitude of the movement, we must look back. A decade ago, playing on Linux was almost utopian. Few developers ported their titles to the Penguin OS, Microsoft has been cornering the PC gaming market for a long time. However, Valve changed this forever from the software side.
It was thanks to Proton, a compatibility layer derived from the old Wine that translates Windows instructions so that Linux understands them. This was the cornerstone of the success of the Steam Deck– Proved that you don’t need Windows to run titles of all types, including many AAA. Now, Valve wants to repeat the move, but changing the objective: from desktop PCs to mobile chips.
The architect in the shadows. It was Pierre-Loup Griffais, leader of SteamOS, who confirmed to The Verge in an interview that Valve has been “secretly” financing several projects since 2016. The most important currently is «FEX-Emu».
- What is it? FEX is an emulator which translates the instructions of the x86 processor (the language of traditional Intel and AMD chips for PCs) to ARM64 (that of current mobile phones).
- The combination: Valve is integrating it into a specific version of Proton for ARM. The goal, according to Steam’s Linux OS boss, is to “remove barriers so users don’t have to worry about which games work.”
Obsession with efficiency. Obviously, these investments are not philanthropy, but pure industrial necessity. The company prepares hardware that needs this technology to exist, such as the future Steam Frame viewer. But there’s more: Griffais explains that ARM chips are superior in efficiency for low-power devices, something that has opened the door to speculations of all kinds.
An ultraportable with Steam smaller than the Deck? Who knows. Without the compatibility layer of FEX and Proton, these devices would be born without a catalog. With it, they could run thousands of PC games from day one, also adding Android games through another protagonist of recent days: “Lepton”. Yes, multiplayer titles with anti-cheats deep, like ‘Fortnite’.


The democratization of gaming. The revolutionary thing about these emulators is that, as they are open source tools, the benefit is universal. It already allows run recent games like ‘Hollow Knight: Silksong’ on an Android mobile without an official version existing. Even manufacturers like Xiaomi have gone ahead with initiatives like “WinPlay” that allows Play Steam titles on your HyperOS devices.
Valve is paving the way so that any powerful device, whether tablet, mobile phone or ARM laptop, can be a potential Steam Machine. This contrasts with the efforts of companies like Microsoft, whose emulation layer, Prism on Windowscontinues fighting with the game compatibility.


The master plan. It is none other than running SteamOS everywhere. Valve wants SteamOS to be the default operating system for gaming, regardless of the silicon underneath. We have already seen the first steps with the arrival of SteamOS to third-party consoles and the announcement of the Steam Machine desktop
By eliminating the barrier of chip architecture (x86 vs ARM) and operating system (Windows vs Linux/Android), the firm ensures that its store is the only constant in a fragmented hardware future. And that only implies one thing: that users spend money on it. A win-win in every rule.
Cover image | Valve
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