Half-Life: Alyx adds Steam Frame standalone support

Valve has released a major update for Half-Life: Alyx that adds support for Steam Frame standalone gameplay, porting the City 17 adventure to ARM64 so it can run on the headset without a PC attached.

The patch is substantial rather than cosmetic. Valve says it made significant rendering and performance optimisations for Steam Frame, updating most of the game’s engine without altering any of its content. Foveated rendering is now supported when playing standalone, and depth reprojection has been added so gameplay stays smooth at lower frame rates.

Desktop players get fixes in the same patch

The update is not Steam Frame-only. Valve reports further performance improvements on desktop PCs and the removal of one tick of latency from player hands and other simulated objects. It also fixes a low-memory warning that appeared on some GPU configurations that had memory to spare, cross-platform cloud saves and subtitles on Linux, a flickering main menu, and a bug that occasionally stopped players interacting with items at the start of a new game.

Alyx keeps its job as Valve’s VR showcase

Valve’s VR flagship arrived in March 2020 as the headline game for its PC-tethered headset, and it has been the company’s proof of concept for every VR push since. Getting a full-length, PC-grade shooter running on an ARM64 headset with no cable is a more convincing demonstration than a minigame collection, which is presumably why Valve spent the engineering time on a six-year-old title instead of building something new.

Our opinion

There is a lopsided arithmetic to modern VR that Valve understands better than most: headsets sell on libraries, and libraries cost far more to fill than they do to showcase. Making Half-Life: Alyx standalone is cheap next to funding another full-length VR game and it lands in the same week as the hardware. The catch is that a 2020 game can only carry a new headset for so long, and Valve has now leaned on the same title for two hardware generations. Committing to a new Alyx-scale VR project would be the more expensive, more honest vote of confidence — and that is the commitment the Steam Frame genuinely needs.