Licenses
Overview
Runeon includes open-source software so it can prepare a Windows Steam container, run the Steam client, provide graphics translation options, and collect optional redacted diagnostics. Runeon itself is proprietary software. The third-party components listed here remain under their own licenses, and Runeon does not limit the rights those licenses give you.
This page covers software bundled with Runeon or its Steam Baseline runtime. It does not cover third-party services such as Supabase, Stripe, Cloudflare, Resend, Apple sign-in, Google sign-in, Steam, or game publishers. Those services are described in Runeon's Privacy Policy and Terms of Service.
Included components
| Component | License | How Runeon uses it |
|---|---|---|
| Wine runtime, built from the CrossOver Wine source lineage | LGPL-2.1-or-later | Runs Windows Steam and Windows game launchers inside Runeon's managed Steam container. |
| MoltenVK | Apache-2.0 | Helps Vulkan-based graphics paths run on Metal where used by the Steam Baseline runtime. |
| SDL2 2.32.10 | Zlib | Lets Wine recognize game controllers and pass them to Windows games. |
| DXMT 0.80 | MIT; Runeon's backported fixes in 0.80-runeon.5 under LGPL-2.1-or-later | Provides a D3D10/11-to-Metal graphics backend option. |
| DXVK 2.7.1 | zlib/libpng | Provides D3D8/9/10/11-to-Vulkan graphics backend support and fallback paths. |
| GStreamer.framework 1.28.8 | LGPL-2.1-or-later plus bundled plugin and dependency licenses | Provides media playback support used by Wine media components. |
| GnuTLS | LGPL-2.1-or-later | Provides TLS and certificate support used by the Wine runtime. |
| GNU libiconv library | LGPL library license | Provides text conversion support used by runtime dependencies. |
| NW.js runtime (NW.js, Chromium, FFmpeg, ANGLE, SwiftShader, Node.js) | MIT, BSD-3-Clause, LGPL-2.1-or-later, Apache-2.0, and bundled third-party licenses | Provides an alternative middleware runtime for some games. Downloaded as a separate runtime component rather than shipped inside the app. |
| Wine Mono 10.4.1 (Framework Mono, WinForms, WPF, FNA, FAudio, FNA3D, SDL3 and other bundled libraries) | MIT; parts under BSD-3-Clause, Apache-2.0, MS-PL, Zlib, and GPL-2.0 with a linking exception (SharpZipLib) | Lets Windows programs built for the .NET Framework, such as some game launchers, run in Wine. Downloaded as a separate runtime component rather than shipped inside the app. |
| Mesa 26.2.4 (llvmpipe OpenGL, with LLVM 23.1.2 statically linked; community MSVC build from pal1000/mesa-dist-win) | MIT; LLVM under Apache-2.0 WITH LLVM-exception | Provides a software OpenGL backend for games that need a newer OpenGL version than macOS offers them. Downloaded as a separate runtime component rather than shipped inside the app. |
| Runeon D3D12 pipeline guard (based on witcher3-crossover-fix; built with the MinGW-w64 runtime and libgcc) | MIT; MinGW-w64 runtime license; GPL-3.0-or-later with the GCC Runtime Library Exception | Works around a D3D12 rendering failure for games whose compatibility recipe enables it. Shipped in the runtime and inactive unless a recipe turns it on. |
| Sparkle 2.10.0 | MIT; bundled code under BSD-2-Clause, MIT and zlib licenses | Checks for, downloads and installs Runeon updates. Shipped inside the app. |
| Twemoji Mozilla 0.7.0 | Apache-2.0; emoji artwork CC-BY-4.0 | Draws color emoji in Steam pages. Downloaded when Runeon prepares the Steam container rather than shipped inside the app. |
| GNU MP, Nettle/Hogweed, libidn2, libunistring | LGPL-3.0-or-later | Provide arithmetic, cryptography, internationalized domain name, and Unicode string support used by the Wine runtime's TLS stack. Runeon distributes these under LGPL-3.0-or-later; they are also available from upstream under GPL-2.0-or-later. |
| Runtime dependency libraries | Respective upstream open-source licenses | Includes libraries such as libtasn1, p11-kit, zlib, zstd, Brotli, libffi, gettext/libintl, and MacPorts legacy support libraries. |
Source and license availability
For LGPL-covered components distributed with Runeon, Runeon provides or points to the corresponding source materials required by those licenses. Current source references are listed below.
- Wine / CrossOver source archive: crossover-sources-26.3.0.tar.gz
- Runeon Wine modifications and corresponding source: cx26.3-wine11.0-runeon.27 — runeon-wine-source-cx26.3-wine11.0-runeon.27.tar.gz (SHA-256
357619318b0aa7283a3ce60ff64b85514c6dd1af228038de505377923a49b8f7) - Runeon Wine corresponding source for Runeon 1.13 (10) to 1.13 (15): cx26.3-wine11.0-runeon.22 — runeon-wine-source-cx26.3-wine11.0-runeon.22.tar.gz (SHA-256
03c8f624b55c0bae6aef3212d231bcc891ed969141df00584cedfd9f13c021f3) - Superseded Runeon Wine corresponding source, previously delivered to Runeon 1.14 (16) and later: cx26.3-wine11.0-runeon.26 — runeon-wine-source-cx26.3-wine11.0-runeon.26.tar.gz (SHA-256
add16bdb5c6df84614ca6b3e6a0d59b8f7f0094467682ac500630747b705c9b3) - Superseded Runeon Wine corresponding source, previously delivered to Runeon 1.14 (16) and later: cx26.3-wine11.0-runeon.24 — runeon-wine-source-cx26.3-wine11.0-runeon.24.tar.gz (SHA-256
42614498d767222316e809e12bf8081318bdb31011dc81437e04ec98fac80ceb) - Superseded Runeon Wine corresponding source, previously delivered to Runeon 1.14 (16) and later: cx26.3-wine11.0-runeon.23 — runeon-wine-source-cx26.3-wine11.0-runeon.23.tar.gz (SHA-256
59cff68420142511b1a3e132d968f957fa4e441ad46f1c5e44791f176f4cb93b) - Superseded Runeon Wine corresponding source, previously delivered to Runeon 1.13 (10) and later: cx26.3-wine11.0-runeon.21 — runeon-wine-source-cx26.3-wine11.0-runeon.21.tar.gz (SHA-256
237035772dca9dccc5b236f94ca079f474c9a2153988499041f8209e1a646245) - Superseded Runeon Wine corresponding source, previously delivered to Runeon 1.13 (10) and later: cx26.3-wine11.0-runeon.20 — runeon-wine-source-cx26.3-wine11.0-runeon.20.tar.gz (SHA-256
cbcddffb03ca494a5a1560e2eba7f453d218705fe77dc6afa74a4043d5d84ed6) - Runeon Wine corresponding source for Runeon 1.12 (6) to 1.13 (9): cx26.3-wine11.0-runeon.18 — runeon-wine-source-cx26.3-wine11.0-runeon.18.tar.gz (SHA-256
6838c44a7ae8a7d252b9433702a03cda584af3a5aa123b5517c5041db3b976fc) - Runeon Wine corresponding source for Runeon 1.10 (3) to 1.11 (4): cx26.3-wine11.0-runeon.17 — runeon-wine-source-cx26.3-wine11.0-runeon.17.tar.gz (SHA-256
2b3a5daa6b6131a81a34a8751a7ada54a8fcc0c1e2c8a97889d5006b2d4bc61f) - Runeon Wine corresponding source for Runeon 1.10 (0) to 1.10 (2): cx26.3-wine11.0-runeon.16 — runeon-wine-source-cx26.3-wine11.0-runeon.16.tar.gz (SHA-256
116de43714f1b744a9bacea243b65053b04ad403d3479954d63f2f54283d7de3) - Runeon Wine corresponding source for Runeon versions before 1.10 (0): cx26.3-wine11.0-runeon.13 — runeon-wine-source-cx26.3-wine11.0-runeon.13.tar.gz (SHA-256
7f423accabd2b4bc20ee964feafec0b92920a5b7392f8f82bb66b21debffa095) - MoltenVK 1.4.2: github.com/KhronosGroup/MoltenVK/tree/db66022459ffb663aa2b50f6b018bc2e124f5edf
- SDL2 2.32.10: github.com/libsdl-org/SDL/tree/release-2.32.10
- DXMT 0.80: github.com/3Shain/dxmt/tree/v0.80
- Runeon DXMT modifications and corresponding source: 0.80-runeon.5 — runeon-dxmt-0.80-runeon.5-source.tar.gz (SHA-256
3487ee84a182f28b2163b8374fca5bdabcdabeda68e7812ac9210cf4a35d6914) - DXVK 2.7.1: github.com/doitsujin/dxvk/tree/v2.7.1
- GStreamer source index: gstreamer.freedesktop.org/src
- GnuTLS: gnutls.org
- GNU libiconv: gnu.org/software/libiconv
- Sparkle 2.10.0, including the license notices for its bundled bsdiff, sais-lite, Ed25519 and SUSignatureVerifier code: github.com/sparkle-project/Sparkle/blob/2.10.0/LICENSE
- Twemoji Mozilla 0.7.0 (emoji artwork © Twitter, Inc. and other contributors, licensed under CC-BY-4.0): github.com/mozilla/twemoji-colr/releases/tag/v0.7.0
- Mesa 26.2.4: gitlab.freedesktop.org/mesa/mesa/-/tree/mesa-26.2.4; build used: github.com/pal1000/mesa-dist-win/releases/tag/26.2.4; LLVM 23.1.2: github.com/llvm/llvm-project/tree/llvmorg-23.1.2
- witcher3-crossover-fix (MIT, Copyright (c) 2026 tholtman1-del), commit 436de811: github.com/tholtman1-del/witcher3-crossover-fix
- Wine Mono 10.4.1 (unmodified official binary package; licenses of each bundled project in its
COPYING): dl.winehq.org/wine/wine-mono/10.4.1/wine-mono-10.4.1-src.tar.xz (SHA-256128e335396689e466dff5e1aa0770a714dbe3d16397fc4ddbb8a80999c67323b); repository: gitlab.winehq.org/mono/wine-mono/-/tree/wine-mono-10.4.1 - NW.js 0.112.0: github.com/nwjs/nw.js/releases/tag/nw-v0.112.0
- Chromium 149.0.7827.29, including the third-party license texts under
third_party: chromium.googlesource.com/chromium/src/+/refs/tags/149.0.7827.29 - FFmpeg, at the exact revision that build uses: chromium/third_party/ffmpeg/+/4d96f67ec9ee29071a096ff222edc03b80326b04
- ANGLE, SwiftShader and Node.js, at the revisions that build pins: chromium.googlesource.com/chromium/src/+/refs/tags/149.0.7827.29/DEPS
If you need corresponding source materials for a Runeon release, contact [email protected] and include the Runeon version number shown in the app. Runeon will provide the source materials or source location required for that release for the period required by the applicable license.
Nothing in Runeon's own license or Terms restricts reverse engineering where an open-source license permits it, including debugging modifications to LGPL-covered components.
Runeon verifies the files of a downloaded runtime component before using it, and will not use one whose files have changed. That check decides only what Runeon itself will run; it does not restrict your right to replace a component with your own build and run it yourself.
Not distributed by Runeon
Runeon does not distribute these components:
- Apple Game Porting Toolkit, D3DMetal.framework, libd3dshared.dylib, or Apple private D3DMetal PE overlays. If setup requires Apple graphics components, the user must provide them from their own local Apple-provided installation.
- Valve Steam client. Runeon installs Windows Steam into the user's Runeon-managed container from Valve's distribution endpoints. Steam remains subject to Valve's terms.
- Games, launchers, DRM systems, anti-cheat systems, game saves, or game publisher services. Those remain controlled by their respective owners.
Trademarks
Steam is a trademark of Valve Corporation. Apple, Game Porting Toolkit, D3DMetal, Metal, Vulkan, Wine, MoltenVK, Microsoft, DirectX, Chromium, NW.js, 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, Wine, DXVK, DXMT, Rockstar Games, or any game publisher unless a separate written agreement says otherwise.