License

Phaethon's own work

LICENSE-PHAETHON.md, blob 97086a36618c

License for Phaethon's own work

Licensor: Alexander J. Semenuk.

Scope: every change this repository holds that is not part of the code it inherited from OpenGOAL's jak-project: the Jak X port, the retail-faithful fixes to the trilogy, the remastered presets, the renderer, the landing tools and the documents, from the fork point onward. The inherited code stays under the ISC License in LICENSE, with the OpenGOAL Team's copyright notice, as that license requires. Where the two meet in one file, the ISC notice covers the lines that came from OpenGOAL and these terms cover the rest.

The terms: the PolyForm Strict License 1.0.0, reproduced from its official plain text below. In one sentence, you may use the software, and you may not distribute it or make changes or new works based on it. The additional terms below add to that: no reverse engineering of the compiled work, and personal, noncommercial changes to the GOAL source.

Additional terms

These terms apply to Phaethon's own work in addition to the PolyForm Strict License 1.0.0 below.

1. Reverse engineering. Reverse engineering, decompiling or disassembling Phaethon's own work in compiled form, or otherwise attempting to derive its source code, structure or algorithms from it, is not permitted, except to the extent applicable law expressly permits it despite this limitation.

2. Notices and signatures. Removing or altering a copyright notice, a license notice, a version block or a digital signature in Phaethon's files is not permitted.

3. Other licenses. Code inherited from OpenGOAL stays under the ISC License in LICENSE, and third-party components stay under their own licenses, listed under notices/. Nothing in these terms limits a right those licenses grant.

4. The GOAL source. Changing the GOAL source shipped with Phaethon for personal, noncommercial use is permitted. Distributing a changed version of it, or of any other part of Phaethon's own work, is not.

PolyForm Strict License 1.0.0

https://polyformproject.org/licenses/strict/1.0.0

Acceptance

In order to get any license under these terms, you must agree to them as both strict obligations and conditions to all your licenses.

Copyright License

The licensor grants you a copyright license for the software to do everything you might do with the software that would otherwise infringe the licensor's copyright in it for any permitted purpose, other than distributing the software or making changes or new works based on the software.

Patent License

The licensor grants you a patent license for the software that covers patent claims the licensor can license, or becomes able to license, that you would infringe by using the software.

Noncommercial Purposes

Any noncommercial purpose is a permitted purpose.

Personal Uses

Personal use for research, experiment, and testing for the benefit of public knowledge, personal study, private entertainment, hobby projects, amateur pursuits, or religious observance, without any anticipated commercial application, is use for a permitted purpose.

Noncommercial Organizations

Use by any charitable organization, educational institution, public research organization, public safety or health organization, environmental protection organization, or government institution is use for a permitted purpose regardless of the source of funding or obligations resulting from the funding.

Fair Use

You may have "fair use" rights for the software under the law. These terms do not limit them.

No Other Rights

These terms do not allow you to sublicense or transfer any of your licenses to anyone else, or prevent the licensor from granting licenses to anyone else. These terms do not imply any other licenses.

Patent Defense

If you make any written claim that the software infringes or contributes to infringement of any patent, your patent license for the software granted under these terms ends immediately. If your company makes such a claim, your patent license ends immediately for work on behalf of your company.

Violations

The first time you are notified in writing that you have violated any of these terms, or done anything with the software not covered by your licenses, your licenses can nonetheless continue if you come into full compliance with these terms, and take practical steps to correct past violations, within 32 days of receiving notice. Otherwise, all your licenses end immediately.

No Liability

As far as the law allows, the software comes as is, without any warranty or condition, and the licensor will not be liable to you for any damages arising out of these terms or the use or nature of the software, under any kind of legal claim.

Definitions

The licensor is the individual or entity offering these terms, and the software is the software the licensor makes available under these terms.

You refers to the individual or entity agreeing to these terms.

Your company is any legal entity, sole proprietorship, or other kind of organization that you work for, plus all organizations that have control over, are under the control of, or are under common control with that organization. Control means ownership of substantially all the assets of an entity, or the power to direct its management and policies by vote, contract, or otherwise. Control can be direct or indirect.

Your licenses are all the licenses granted to you for the software under these terms.

Use means anything you do with the software requiring one of your licenses.

The code inherited from OpenGOAL

LICENSE, blob 9f8c67bbfbaf

ISC License

Copyright (c) 2020-2026 OpenGOAL Team

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Notices: NVIDIA DLSS

docs/notices/dlss.md, blob 22d12aae9caa

Third party notices: NVIDIA DLSS

This file exists because the DLSS programming guide requires it. Section 4.2.3 of the guide, "Notice of inclusion of third-party code", says that the DLSS DLL shipped with a game includes third party code that has to be acknowledged in the public documentation of the final product, and names section 9.5 as the text to reproduce. Everything under "NVIDIA DLSS notices" below is that section, verbatim, from the release guide carried in the SDK this build fetches (doc/DLSS_Programming_Guide_Release.pdf, dated 31 March 2026, in the tree tagged v310.9.1). Nothing in it is mine and nothing in it is edited.

NOTHING FROM THE SDK IS IN THIS REPOSITORY. The headers and the import library are fetched at configure time and only when JAK_NGX is ON, into the build directory; the runtime library is a deployment step and never a tracked file.

What the release owner still has to do

These are obligations this rung cannot discharge from a source tree. They are listed with the section that imposes each, so the person who owns a release can act on them; the wording of each obligation is mine, and the sections are the ones to read.

The license readings above are the 2026-09-20 spike's, taken from the license texts rather than from counsel.

NVIDIA DLSS notices

The text below is section 9.5 of the DLSS programming guide, reproduced without alteration.

The information provided in this specification is believed to be accurate and reliable as of the date
provided. However, NVIDIA Corporation (“NVIDIA”) does not give any representations or warranties,
expressed or implied, as to the accuracy or completeness of such information. NVIDIA shall have no
liability for the consequences or use of such information or for any infringement of patents or other
rights of third parties that may result from its use. This publication supersedes and replaces all other
specifications for the product that may have been previously supplied.

NVIDIA reserves the right to make corrections, modifications, enhancements, improvements, and other
changes to this specification, at any time and/or to discontinue any product or service without notice.
Customer should obtain the latest relevant specification before placing orders and should verify that
such information is current and complete.
NVIDIA products are sold subject to the NVIDIA standard terms and conditions of sale supplied at the
time of order acknowledgement, unless otherwise agreed in an individual sales agreement signed by
authorized representatives of NVIDIA and customer. NVIDIA hereby expressly objects to applying any
customer general terms and conditions with regard to the purchase of the NVIDIA product referenced in
this specification.
NVIDIA products are not designed, authorized or warranted to be suitable for use in medical, military,
aircraft, space or life support equipment, nor in applications where failure or malfunction of the NVIDIA
product can reasonably be expected to result in personal injury, death or property or environmental
damage. NVIDIA accepts no liability for inclusion and/or use of NVIDIA products in such equipment or
applications and therefore such inclusion and/or use is at customer’s own risk.
NVIDIA makes no representation or warranty that products based on these specifications will be suitable
for any specified use without further testing or modification. Testing of all parameters of each product is
not necessarily performed by NVIDIA. It is customer’s sole responsibility to ensure the product is
suitable and fit for the application planned by customer and to do the necessary testing for the
application in order to avoid a default of the application or the product. Weaknesses in customer’s
product designs may affect the quality and reliability of the NVIDIA product and may result in additional
or different conditions and/or requirements beyond those contained in this specification. NVIDIA does
not accept any liability related to any default, damage, costs or problem which may be based on or
attributable to: (i) the use of the NVIDIA product in any manner that is contrary to this specification, or
(ii) customer product designs.
No license, either expressed or implied, is granted under any NVIDIA patent right, copyright, or other
NVIDIA intellectual property right under this specification. Information published by NVIDIA regarding
third-party products or services does not constitute a license from NVIDIA to use such products or
services or a warranty or endorsement thereof. Use of such information may require a license from a
third party under the patents or other intellectual property rights of the third party, or a license from
NVIDIA under the patents or other intellectual property rights of NVIDIA. Reproduction of information in
this specification is permissible only if reproduction is approved by NVIDIA in writing, is reproduced
without alteration, and is accompanied by all associated conditions, limitations, and notices.
ALL NVIDIA DESIGN SPECIFICATIONS, REFERENCE BOARDS, FILES, DRAWINGS, DIAGNOSTICS, LISTS, AND
OTHER DOCUMENTS (TOGETHER AND SEPARATELY, “MATERIALS”) ARE BEING PROVIDED “AS IS.” NVIDIA
MAKES NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO THE
MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
Notwithstanding any damages that customer might incur for any reason whatsoever, NVIDIA’s
aggregate and cumulative liability towards customer for the products described herein shall be limited
in accordance with the NVIDIA terms and conditions of sale for the product.

9.5.1 Trademarks
NVIDIA and the NVIDIA logo are trademarks and/or registered trademarks of NVIDIA Corporation in the
U.S. and other countries. Other company and product names may be trademarks of the respective
companies with which they are associated.
9.5.2 Copyright
© 2018-2020 NVIDIA Corporation. All rights reserved.
www.nvidia.com

Notices: AMD FidelityFX SDK

docs/notices/fsr.md, blob e58f06d6e911

Third party notices: AMD FidelityFX SDK

This file exists because the FidelityFX SDK is MIT licensed and the MIT license requires its copyright notice and permission notice to be included in all copies or substantial portions of the software. A build configured with JAK_FSR links two static libraries built from that source into the runtime, which is such a portion, so the text below travels with the binary through this file. Everything under "FidelityFX SDK notices" is sdk/LICENSE.txt from the tree this build fetches, verbatim. Nothing in it is mine and nothing in it is edited.

NOTHING FROM THE SDK IS IN THIS REPOSITORY. The source is cloned at configure time and only when JAK_FSR is ON, into the build directory, which is ignored by git; the SDK is built there and the two static libraries are linked from there. No header, no library and no shader blob is a tracked file.

Which tree: github.com/GPUOpen-LibrariesAndSDKs/FidelityFX-SDK at the tag the top level CMakeLists.txt pins in JAK_FSR_TAG, which is v1.1.4 as this is written. Only the FSR3 upscaler component and the Vulkan backend are built; frame interpolation, optical flow and every other effect in the SDK are left out of the build entirely.

What the release owner still has to do

FidelityFX SDK notices

This file is part of the FidelityFX SDK.

Copyright (C) 2024 Advanced Micro Devices, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and /or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

Notices: the debug window's fonts

docs/notices/fonts.md, blob 7d6e86fe226f

Third party notices: fonts

Every typeface shipped in assets/fonts/ and the license each is under. The license text itself sits beside the font file, which is what the SIL Open Font License asks for: its condition 2 says the font may be redistributed only with a copy of the license.

JetBrains Mono is the debug UI's face (issue 2213). It is loaded at run time from the path above by debug_ui::load_font, not linked in, so a build that does not ship the assets directory falls back to ImGui's built in font and still draws.

lucide is the icon face, merged into that same font by the same call. One glyph of it is asked for, pin at U+E259, which is the debug window's pin button; the merge names that codepoint and excludes every other, so the atlas holds one icon rather than 2,132. The file is the font/lucide.ttf of the lucide-static npm package at 1.47.0, and the license text beside it is that package's own LICENSE. A build without it draws the pin from primitives.

Noto Sans and its JP and KR faces are the subtitle overlay's (issue 3441), loaded at run time by subtitle_overlay::FaceLoader. Each is a subset: the variable font of google/fonts (ofl/notosans/NotoSans[wdth,wght].ttf, ofl/notosansjp/NotoSansJP[wght].ttf, ofl/notosanskr/NotoSansKR[wght].ttf, fetched 2026-10-08) instanced at weight 600 with fonttools varLib.instancer --static, then cut by pyftsubset --layout-features= --no-hinting --name-IDs='*' to the characters the games can spell: every character the four games' font tables in common/util/font/dbs/ name, the text of every language file under assets/<game>/subtitle/ and assets/<game>/text/, the disc's text banks, the pad icons font_utils.cpp draws and all of printable ASCII in each, and for Korean the 2,350 syllables of KS X 1001 and every jamo Jak II's table names, since Korean composes its syllables from jamo. A character added to a table or a file is added to the subset the same way, or its line draws nothing; SubtitleOverlayFaces.TheSubsetsHoldEveryCharacterTheGamesSpell reds until it is.

Those three are modified by the subset, which the OFL allows; none is sold on its own, and none carries a reserved font name: Noto Sans has none, and the JP and KR faces' reserved name is 'Source'. No other font here is modified.

Notices: the cutscene upscaler's weights

docs/notices/fmv-upscale.md, blob 4ee547d3d9fc

Third party notices: the FMV upscale network

The enhanced mode's cutscene upscaler (issue 2422, rung R7) runs one neural network whose weights ship in this repository, and those weights are licensed under Creative Commons Attribution 4.0 International. That license asks for the attribution below wherever the weights are shared, and asks that modifications be indicated, which is what this file does.

What was changed

The weights were converted, not retrained: scripts/jakx/export_fmv_upscale_weights.py reads the safetensors file above, checks its sha256, rounds every parameter from float32 to float16 (round to nearest even) and writes them in the model's own tensor order behind a 16 byte header. Nothing else about the network is altered. The runtime (runtime/graphics/renderer/FmvUpscaler.cpp, shaders/fmv_upscale.comp) is this fork's own port of the network's forward pass and is covered by the repository's license, not by this one.

What the release owner still has to do

The license disclaims warranty (section 5) and grants no trademark or patent rights (section 2(b)).