This is my Steam Frame build of Team Beef's Lambda1VR, the Xash3D-FWGS and GoldSrc-based Half-Life VR port. It runs in the Frame's Lepton Android container with ARM64, OpenXR and GLES. See the architecture notes for the input and rendering details.

EXPERIMENTAL. I made this for personal use. This is a source release of my Frame changes to Team Beef's existing port, with the original GPLv3 and component notices kept. See the build and publication notes. The original README is preserved.

The Frame build keeps tracked head and hands, stereo rendering, Steam Frame controller bindings, a laser pointer for menus, snap or smooth turning, and a flat-screen viewing option. I've played it on my Frame and found it smooth, sharp and clean. The in-game laser sight and several upstream assets, including Barney's vest and helmet and the scope sprite, are known gaps.

Half-Life data

You need the full retail Half-Life game data from your own copy. The app can read Half-Life installed through Steam on the Frame, or a valve/ folder under /sdcard/Documents/Lambda1VR/valve (~/Documents/Lambda1VR/valve on SteamOS). Half-Life: Source is not compatible. Saves and settings live in the same Documents folder. The bundled extras.pak comes unchanged from Team Beef's public source; it doesn't replace the required retail game files.

Build and install

Build on x86-64 Linux or macOS, or on Windows through WSL2 with an x86-64 Ubuntu distribution. These instructions use Bash. On Apple Silicon, install Rosetta for the pinned NDK's x86-64 host tools; Steam Frame is ARM64 and is not a host for this Android toolchain.

Clone the public Frame branch and its submodules:

mkdir -p ~/src
cd ~/src
git clone --recurse-submodules --branch frame-dev https://github.com/astromaddie/lambda1-vr.git
cd lambda1-vr

Use JDK 17 and the Android SDK packages listed in the Steam Frame guide. Before the first build, restore the release assets the repository does not track, then build the Frame variant:

bash tools/steam_frame/fetch_release_assets.sh
cd Projects/Android
sh ./gradlew assembleFrame

The APK is Projects/Android/build/outputs/apk/frame/lambda1vr-frame.apk. Building creates the APK; it does not install or launch it. The guide covers the first upload, later updates, and your Half-Life data.