Q&A with Valve executive Pierre-Loup Griffais, who helped architect SteamOS and the Steam Deck, on quietly funding open-source tech to play Windows games on ARM
In an exclusive interview, Valve reveals it's the architect behind a push to bring Windows games to Arm.
Context & Ripple Effects
Valve's handheld strategy has been tied to a Linux-based software stack rather than a closed-console model; earlier coverage framed the Steam Deck as allowing software from outside a single gatekeeper through its Arch Linux-based openness.
The company has also iterated on the Deck with community-driven improvements, as Griffais discussed in a first-year Steam Deck interview. Its disclosed backing for open-source work now extends that compatibility agenda toward Arm hardware and Windows game libraries.
First-order effects
- Valve's funding gives the open-source effort behind Windows-game compatibility on Arm a named backer, while positioning Griffais and Valve's SteamOS experience at the center of the work.
- The immediate target is broader hardware compatibility for Windows games, rather than a change to the Steam Deck's existing product proposition.
Second-order effects
- If the funded work becomes usable across devices, Arm-based hardware makers could gain a less platform-dependent route to PC game libraries; game creators may face fewer architecture-specific barriers without having to port each title themselves.
- The move raises the value of compatibility layers and open tooling as differentiators for handheld and living-room PC platforms, an area Valve had explored well before the Deck in its earlier Steam Machines push.
Third-order effects
- The longer-term implication is a contest over whether PC game access is controlled primarily by a single operating-system architecture or mediated by portable, community-maintained compatibility infrastructure.
- That outcome remains contingent on technical performance and software support, but sustained investment would reinforce Valve's ability to expand Steam's reach without tying its hardware strategy to a closed platform.
The trend: Valve is using open-source compatibility work to make its game distribution ecosystem less dependent on any one device architecture or platform gatekeeper.