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Open-source licenses

Last updated May 26, 2026

Overview

This notice applies to Runeon app releases and to the Steam Baseline runtime seed distributed with those releases. Runeon itself is proprietary software. Third-party components remain subject to their own licenses, and Runeon does not relicense or restrict those components.

Distributed with Runeon

Component License How Runeon uses it Source / source offer
Wine / CrossOver Wine source lineage LGPL-2.1-or-later Windows compatibility runtime included in SteamBaselineRuntimeSeed.tar.gz. Upstream source archive: crossover-sources-26.1.0.tar.gz. Runeon patch/build scripts are maintained in Runeon/Runeon/SteamBaseline/prepare_steam_baseline_runtime.sh and Runeon/Runeon/SteamBaseline/create_steam_baseline_runtime_seed.sh.
MoltenVK Apache-2.0 Vulkan-to-Metal runtime support, currently bundled as libMoltenVK.dylib in the Steam Baseline runtime seed. github.com/KhronosGroup/MoltenVK
DXMT v0.80 MIT D3D10/11-to-Metal runtime component bundled as Runeon/Runeon/BundledResources/GraphicsBackends/DXMT/0.80/dxmt-v0.80-builtin.tar.gz. Runeon seeds it into runtime/steam-baseline/components/dxmt/0.80/ and uses it as the default backend for detected D3D10/11 games. Release: DXMT v0.80. Source tag: v0.80. Asset sha256: 8f260e36b5739e68f3bad613381441385c4dc7b85b78ba8de653d5a6a264529d.
DXVK v2.7.1 zlib/libpng D3D8/9/10/11-to-Vulkan runtime component bundled as Runeon/Runeon/BundledResources/GraphicsBackends/DXVK/2.7.1/dxvk-2.7.1.tar.gz. Runeon seeds D3D8/D3D9/D3D10/D3D11/DXGI DLLs into runtime/steam-baseline/components/dxvk/2.7.1/, uses DXVK as the default backend for detected D3D8/9 games, and uses it as fallback for detected D3D10/11 games when DXMT is unavailable or blocked. Release: DXVK v2.7.1. Source tag: v2.7.1. Asset sha256: d85ce7c79f57ecd765aaa1b9e7007cb875e6fde9f6d331df799bce73d513ce87.
GStreamer.framework v1.28.2 LGPL-2.1-or-later plus bundled plugin/dependency licenses Media runtime component bundled as Runeon/Runeon/BundledResources/Media/GStreamer/1.28.2/gstreamer-framework-1.28.2-macos-universal.tar.gz. Runeon installs it into the Steam Baseline runtime during preparation for Wine Media Foundation / H.264 playback. Official macOS runtime package: gstreamer-1.0-1.28.2-universal.pkg. Source index: gstreamer.freedesktop.org/src. Upstream package sha256: 964ff693002aaa69b2908f79967609b424ddc61210849e1afe5e8d8810f68b91. Runeon framework archive sha256: 3bd9b3db28972017e4b01cd9e9bb79b7368009f328ec04844ccf4d3e4cfb95d6.
GnuTLS LGPL-2.1-or-later TLS and certificate support used by Wine CryptoAPI and Steam authentication. gnutls.org
GNU libiconv LGPL library / GPL command-line program Runtime text conversion dependency for Wine and TLS support. Runeon uses the library component. gnu.org/software/libiconv
TLS and runtime dependency libraries Respective upstream open-source licenses Bundled runtime dependencies include libtasn1, libidn2, libunistring, Nettle/Hogweed, GMP, p11-kit, zlib, zstd, Brotli, libffi, gettext/libintl, and MacPorts legacy support libraries. See each upstream project and the source offer below.

Release rule: if the bundled runtime changes, update this notice and the in-app Open-source notices sheet before shipping.

Corresponding source offer

For Runeon releases that include SteamBaselineRuntimeSeed.tar.gz, the release must provide the corresponding LGPL runtime source materials. The Wine/CrossOver source archive used by the current build pipeline is: https://media.codeweavers.com/pub/crossover/source/crossover-sources-26.1.0.tar.gz.

Runeon's Steam webhelper patch, build flags, dependency wiring, and seed preparation logic are maintained in:

  • Runeon/Runeon/SteamBaseline/prepare_steam_baseline_runtime.sh
  • Runeon/Runeon/SteamBaseline/create_steam_baseline_runtime_seed.sh

If this runtime seed changes, publish or attach the updated corresponding source materials before shipping the app.

DXMT v0.80 is distributed under the MIT license according to the upstream release notes for v0.80. Future DXMT releases may be LGPL; if Runeon bundles a future LGPL DXMT build, this notice must be updated and the corresponding source or source offer for that exact build must be provided before shipping.

DXVK v2.7.1 is distributed under the zlib/libpng license. If Runeon upgrades the bundled DXVK component, the pinned release URL, source tag, SHA-256, and notice must be updated before shipping.

GStreamer.framework v1.28.2 is repacked from the official upstream macOS runtime package. If Runeon upgrades the bundled GStreamer component, the pinned runtime package URL, source index, SHA-256 values, plugin/dependency license notes, and codec/patent review must be updated before shipping.

Not distributed by Runeon

Component Status
Apple Game Porting Toolkit / D3DMetal Runeon does not distribute Apple private components, including D3DMetal.framework, libd3dshared.dylib, or GPTK PE DLL overlays. Users provide a local Apple/Game Porting Toolkit installation; Runeon validates or copies from that user-local source during runtime preparation.
Valve Steam client Runeon does not bundle Steam. SteamSetup.exe is downloaded from Valve and installed into the user's Runeon-managed Steam container. Steam remains subject to Valve's terms.

Trademarks

Steam is a trademark of Valve Corporation. Apple, Game Porting Toolkit, D3DMetal, Metal, Vulkan, Wine, MoltenVK, and other product names are trademarks or registered trademarks of their respective owners. Runeon is not affiliated with, endorsed by, or sponsored by Valve, Apple, Khronos, CodeWeavers, or any game publisher.

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