Valve, a giant in the development of games and digital platforms, confirmed that it is the main financier of the technologies that enable the execution of titles developed for Windows and x86 architecture on devices equipped with Arm processors. Esta revelation, made by Pierre-Loup
The strategy uses open-source compatibility layers, such as Proton and the Fex emulator, both supported almost entirely by Valve since 2016. Esse continuous investment demonstrates the company’s commitment to platform interoperability.
The same technology already equips the Steam Frame headset and can be applied to Android smartphones, without the need for official modification of the games. Isso sets a significant precedent for the future of gaming on portable devices.
The strategy behind compatibility in Arm
The initiative began between 2016 and 2017, when the company identified that Arm chips would dominate low-power, high-performance devices. During this period, Valve recruited highly specialized open-source developers and funded the creation of Fex, an innovative emulator capable of translating x86 code to Arm in real time.
Ryan Houdek, the Fex project lead, confirmed that Valve has fully covered the costs that have allowed the team to work exclusively on the emulator since 2018. Este Comprehensive funding also includes ongoing improvements to Proton, an optimized version of
This strategic support reflects Valve’s vision to create a more inclusive and accessible gaming ecosystem where hardware architectural barriers are minimized. The company invests so that developers can focus on creating content, and not on complex optimizations for each platform.
Execution Engines: How x86 Games Run on Arm
The process of running x86 games on Arm architecture combines multiple layers of software efficiently. Inicialmente, Proton works by translating API calls from Windows to the Linux environment, a key step towards compatibility.
Then the Fex emulator kicks in, translating x86 instructions into native Arm code only at times when it is strictly necessary. Essa selective approach significantly optimizes performance by avoiding complete and unnecessary emulation of all code.
Crucial points for this technology to work include:
According to Griffais, the emulation may pause when the game makes calls to graphics APIs such as DirectX or Vulkan. In Nestes cases, these calls are already executed in native Arm code through Proton, which guarantees greater fluidity and use of the hardware.
The unified SteamOS and its updates
There is no separate version of SteamOS developed exclusively for the Arm architecture; the operating system maintains the same Arch Linux base used in the Steam Deck and the future Steam Machine. Esta unified approach simplifies development and maintenance, ensuring that all platforms benefit from the same innovations consistently. The system’s flexibility allows it to adapt to different hardware configurations without the need for complex restructuring or specific ports.
The main difference lies in the Proton package, which is specific to Arm and automatically includes the Fex emulator when it detects the presence of x86 code in games. Updates for SteamOS and its components arrive simultaneously for all supported architectures, ensuring users have access to the latest performance and compatibility improvements regardless of the device they are using. Isso reinforces Valve’s strategy of maintaining a cohesive and updated ecosystem for all its products.
Practical applications and the future of gaming cell phones
As early as 2025, users demonstrate the ability to run games like Hollow Knight: Silksong on devices like the Samsung Galaxy S25, even without an official version for Android. Este advancement is possible thanks to applications like GameHub, which utilize the Proton and Fex layers, both of which are publicly available. The enthusiast community has been instrumental in experimenting and validating these technologies on mobile devices.
While Valve hasn’t confirmed plans to launch a “Steam Phone,” Pierre-Loup Griffais hasn’t ruled out the possibility of the company exploring new frontiers in mobile hardware. Ele indicated that Valve remains open to exploring new frontiers in mobile hardware, always focusing on expanding access to PC gaming to an ever-wider audience.
Strategic partnerships and the hardware ecosystem
The company adopts an open and collaborative approach to partnerships with original equipment manufacturers (OEMs). Já There were contacts and discussions with manufacturers of living room consoles, portable devices and possible notebooks with Arm processors, signaling a future of greater integration between hardware and software. Essa openness is crucial to expanding the reach of the technology developed by Valve.
The initial focus of the Valve remains on delivering the Steam Machine and the Steam Frame, devices that represent the company’s vision for gaming in different formats. Contudo, the executive highlighted that support for new Arm devices will be gradually expanded through continuous SteamOS updates, demonstrating a long-term strategy for the ecosystem.
Valve’s vision for gaming in Arm
Griffais projects a near future with significant growth in portable devices equipped with Arm chips, including those with varying performance levels, even below Steam Deck, making gaming more accessible. Ele also mentioned the great potential for ultraportable laptops and even desktops based on powerful SoCs, comparable to those of the Apple, which would transform the PC hardware landscape.
Valve firmly maintains its philosophy of investing in open technologies that benefit the entire PC ecosystem, not just its own products. The goal is clear: to prevent developers from dedicating time and resources to specific architecture ports, ensuring that the vast catalog of PC games is accessible to an ever-widening range of hardware, promoting innovation and diversity in the market.
