# What a game's source tree lets a seller pass on

> 7 of 19 engine, middleware and asset store licences we read let their code or content leave a studio only compiled into the shipped game, read 28 October 2026.

Sell Game Source Code · https://sellgamesourcecode.com/datasets/game-engine-code-pass-on-terms/ · computed 2026-10-28

**Licences that let their code leave a studio only inside the built game:** 7 of 19 licences (20 licence documents read; 24 named).

## The answers, question by question

- **Passing its code or content on with the source:** only compiled into the shipped game 7, allowed, with its open licence attached 6, not allowed without the vendor's permission 4, only to someone holding the vendor's own licence 2
- **Using it to train AI:** not stated 15, barred 3, needs the vendor's or provider's consent 1
- **What the developer owns:** not stated 16, the developer's own work, not the vendor's 3
- **The licence, in its words:** stated 19

## Every licence

| Licence | Passing its code or content on with the source | Using it to train AI | What the developer owns | The licence, in its words |
|---|---|---|---|---|
| Bevy | allowed, with its open licence attached | not stated | not stated | Permission is hereby granted, free of charge, to any person obtaining a copy |
| Crytek, CRYENGINE | not allowed without the vendor's permission | not stated | not stated | You may not sub-license, transfer, charge others to use or access CRYTEK Software or… |
| Defold | allowed, with its open licence attached | not stated | not stated | Put the license in a text file and include it with the distribution of your application. |
| Epic Games, Unreal Engine | only to someone holding the vendor's own licence | barred | the developer's own work, not the vendor's | result in a sale or grant of a security interest in any Licensed Technology; |
| Epic Games, Unreal Engine content | only compiled into the shipped game | barred | the developer's own work, not the vendor's | you may not Distribute Licensed Content in source format to third parties except to… |
| Esoteric Software, Spine Editor | not allowed without the vendor's permission | not stated | not stated | a limited, revocable, non-exclusive, non-sublicensable, and non-transferable license |
| Esoteric Software, Spine Runtimes | only to someone holding the vendor's own licence | not stated | not stated | provided that each user of the Products must obtain their own Spine Editor license |
| Fab | only compiled into the shipped game | barred | the developer's own work, not the vendor's | Under a Standard License, you may not Distribute Content on a standalone basis to third… |
| Firelight Technologies, FMOD | only compiled into the shipped game | not stated | not stated | A license gives the holder permission to distribute the FMOD Engine in a game. |
| Havok | not allowed without the vendor's permission | not stated | not stated | Any reproduction or redistribution of the Products not in accordance with the applicable… |
| inkle, ink | allowed, with its open licence attached | not stated | not stated | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| Mirror | allowed, with its open licence attached | not stated | not stated | Permission is hereby granted, free of charge, to any person obtaining a copy |
| OGRE | allowed, with its open licence attached | not stated | not stated | The only condition is that you distribute the license text included in our distribution… |
| Open 3D Engine | allowed, with its open licence attached | not stated | not stated | you may elect at your option to use the Open 3D Engine under the MIT License |
| RPG Maker | not allowed without the vendor's permission | not stated | not stated | Extraction of Company Programs or Company Assets from User Games and Distribution, etc. |
| Unity Asset Store | only compiled into the shipped game | needs the vendor's or provider's consent | not stated | (g) use the Unity Asset Store or Assets for purposes such as training an artificial… |
| Unity, Editor | only compiled into the shipped game | not stated | not stated | you may distribute the Unity Runtime as an integrated part of your Projects, solely as… |
| Unity, packages | only compiled into the shipped game | not stated | not stated | Exercise of the distribution license granted under this License is limited to… |
| Valve, Steamworks SDK | only compiled into the shipped game | not stated | not stated | use and locally reproduce the SDK in source code form, solely to develop the Licensee… |

## The sentence each answer rests on (80)

- Bevy, [Bevy MIT licence](https://github.com/bevyengine/bevy/blob/main/LICENSE-MIT), read 2026-10-28, Passing its code or content on with the source: "Permission is hereby granted, free of charge, to any person obtaining a copy"
- Bevy, [Bevy MIT licence](https://github.com/bevyengine/bevy/blob/main/LICENSE-MIT), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 1,887 characters long.
- Bevy, [Bevy MIT licence](https://github.com/bevyengine/bevy/blob/main/LICENSE-MIT), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 1,887 characters long.
- Bevy, [Bevy MIT licence](https://github.com/bevyengine/bevy/blob/main/LICENSE-MIT), read 2026-10-28, The licence, in its words: "Permission is hereby granted, free of charge, to any person obtaining a copy"
- Crytek, CRYENGINE, [CRYENGINE Terms of Service](https://www.cryengine.com/terms), read 2026-10-28, Passing its code or content on with the source: "You may not sub-license, transfer, charge others to use or access CRYTEK Software or commercially exploit the Crytek Software in any other way."
- Crytek, CRYENGINE, [CRYENGINE Terms of Service](https://www.cryengine.com/terms), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 43,746 characters long.
- Crytek, CRYENGINE, [CRYENGINE Terms of Service](https://www.cryengine.com/terms), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 43,746 characters long.
- Crytek, CRYENGINE, [CRYENGINE Terms of Service](https://www.cryengine.com/terms), read 2026-10-28, The licence, in its words: "You may not sub-license, transfer, charge others to use or access CRYTEK Software or commercially exploit the Crytek Software in any other way."
- Defold, [The Defold License](https://defold.com/license/), read 2026-10-28, Passing its code or content on with the source: "You are free to distribute original or modified (derivative) versions of Defold."
- Defold, [The Defold License](https://defold.com/license/), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 14,664 characters long.
- Defold, [The Defold License](https://defold.com/license/), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 14,664 characters long.
- Defold, [The Defold License](https://defold.com/license/), read 2026-10-28, The licence, in its words: "Put the license in a text file and include it with the distribution of your application."
- Epic Games, Unreal Engine, [Unreal Engine EULA](https://www.unrealengine.com/en-US/eula/unreal), read 2026-10-08, Passing its code or content on with the source: "You may Distribute Engine Code (including as modified by you) in Source Code or object code to a third party who is separately licensed by us to use the same version of the Engine Code that you are Distributing."
- Epic Games, Unreal Engine, [Unreal Engine EULA](https://www.unrealengine.com/en-US/eula/unreal), read 2026-10-08, Using it to train AI: "result in using the Licensed Technology as a training input to any Generative AI Program or as prompt-based input where the Generative AI Program trains on input data."
- Epic Games, Unreal Engine, [Unreal Engine EULA](https://www.unrealengine.com/en-US/eula/unreal), read 2026-10-08, What the developer owns: "As between you and us, you own all rights, other than rights in the Licensed Technology, in the Products you develop under this Agreement"
- Epic Games, Unreal Engine, [Unreal Engine EULA](https://www.unrealengine.com/en-US/eula/unreal), read 2026-10-08, The licence, in its words: "result in a sale or grant of a security interest in any Licensed Technology;"
- Epic Games, Unreal Engine content, [Unreal Engine content EULA](https://www.unrealengine.com/en-US/eula/content), read 2026-10-28, Passing its code or content on with the source: "You may Distribute Licensed Content incorporated in object code format only as an inseparable part of a Project to end users."
- Epic Games, Unreal Engine content, [Unreal Engine content EULA](https://www.unrealengine.com/en-US/eula/content), read 2026-10-28, Using it to train AI: "You shall not collect, aggregate, mine, scrape, or otherwise use NoAI Content (i) in datasets utilized by Generative AI Programs;"
- Epic Games, Unreal Engine content, [Unreal Engine content EULA](https://www.unrealengine.com/en-US/eula/content), read 2026-10-28, What the developer owns: "As between you and us, you own all rights, other than rights in the Licensed Content or as stated in the Service-Specific Terms"
- Epic Games, Unreal Engine content, [Unreal Engine content EULA](https://www.unrealengine.com/en-US/eula/content), read 2026-10-28, The licence, in its words: "you may not Distribute Licensed Content in source format to third parties except to employees, affiliates, and contractors who are utilizing the Licensed Content in good faith to develop a Proj"
- Esoteric Software, Spine Editor, [Spine Editor License](https://esotericsoftware.com/spine-editor-license), read 2026-10-28, Passing its code or content on with the source: "a limited, revocable, non-exclusive, non-sublicensable, and non-transferable license"
- Esoteric Software, Spine Editor, [Spine Editor License](https://esotericsoftware.com/spine-editor-license), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 27,309 characters long.
- Esoteric Software, Spine Editor, [Spine Editor License](https://esotericsoftware.com/spine-editor-license), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 27,309 characters long.
- Esoteric Software, Spine Editor, [Spine Editor License](https://esotericsoftware.com/spine-editor-license), read 2026-10-28, The licence, in its words: "a limited, revocable, non-exclusive, non-sublicensable, and non-transferable license"
- Esoteric Software, Spine Runtimes, [Spine Runtimes License](https://esotericsoftware.com/spine-runtimes-license), read 2026-10-28, Passing its code or content on with the source: "provided that each user of the Products must obtain their own Spine Editor license"
- Esoteric Software, Spine Runtimes, [Spine Runtimes License](https://esotericsoftware.com/spine-runtimes-license), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 2,058 characters long.
- Esoteric Software, Spine Runtimes, [Spine Runtimes License](https://esotericsoftware.com/spine-runtimes-license), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 2,058 characters long.
- Esoteric Software, Spine Runtimes, [Spine Runtimes License](https://esotericsoftware.com/spine-runtimes-license), read 2026-10-28, The licence, in its words: "provided that each user of the Products must obtain their own Spine Editor license"
- Fab, [Fab EULA](https://www.fab.com/eula), read 2026-10-08, Passing its code or content on with the source: "you may, however, only authorize end users to make use of Content solely as incorporated in the Project in object code"
- Fab, [Fab EULA](https://www.fab.com/eula), read 2026-10-08, Using it to train AI: "Under a Standard License, you may not use NoAI Content (a) in datasets utilized by Generative AI Programs"
- Fab, [Fab EULA](https://www.fab.com/eula), read 2026-10-08, What the developer owns: "you own all rights, other than rights in the Content, in anything you make with the Content under this agreement"
- Fab, [Fab EULA](https://www.fab.com/eula), read 2026-10-08, The licence, in its words: "Under a Standard License, you may not Distribute Content on a standalone basis to third parties except to your collaborators"
- Firelight Technologies, FMOD, [FMOD EULA](https://www.fmod.com/legal), read 2026-10-28, Passing its code or content on with the source: "FMOD SDK files are not to be distributed with the exception of the FMOD Engine run-time libraries"
- Firelight Technologies, FMOD, [FMOD EULA](https://www.fmod.com/legal), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 17,571 characters long.
- Firelight Technologies, FMOD, [FMOD EULA](https://www.fmod.com/legal), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 17,571 characters long.
- Firelight Technologies, FMOD, [FMOD EULA](https://www.fmod.com/legal), read 2026-10-28, The licence, in its words: "FMOD SDK files are not to be distributed with the exception of the FMOD Engine run-time libraries"
- Firelight Technologies, FMOD, [FMOD licensing page](https://www.fmod.com/licensing), read 2026-10-28, Passing its code or content on with the source: "A license gives the holder permission to distribute the FMOD Engine in a game."
- Firelight Technologies, FMOD, [FMOD licensing page](https://www.fmod.com/licensing), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 3,017 characters long.
- Firelight Technologies, FMOD, [FMOD licensing page](https://www.fmod.com/licensing), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 3,017 characters long.
- Firelight Technologies, FMOD, [FMOD licensing page](https://www.fmod.com/licensing), read 2026-10-28, The licence, in its words: "A license gives the holder permission to distribute the FMOD Engine in a game."
- Havok, [Havok terms of use](https://www.havok.com/terms-of-use/), read 2026-10-28, Passing its code or content on with the source: "Any reproduction or redistribution of the Products not in accordance with the applicable License Agreement is expressly prohibited by law"
- Havok, [Havok terms of use](https://www.havok.com/terms-of-use/), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 41,642 characters long.
- Havok, [Havok terms of use](https://www.havok.com/terms-of-use/), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 41,642 characters long.
- Havok, [Havok terms of use](https://www.havok.com/terms-of-use/), read 2026-10-28, The licence, in its words: "Any reproduction or redistribution of the Products not in accordance with the applicable License Agreement is expressly prohibited by law"
- inkle, ink, [ink MIT licence](https://github.com/inkle/ink/blob/master/LICENSE.txt), read 2026-10-28, Passing its code or content on with the source: "to use, copy, modify, merge, publish, distribute, sublicense, and/or sell"
- inkle, ink, [ink MIT licence](https://github.com/inkle/ink/blob/master/LICENSE.txt), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 2,369 characters long.
- inkle, ink, [ink MIT licence](https://github.com/inkle/ink/blob/master/LICENSE.txt), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 2,369 characters long.
- inkle, ink, [ink MIT licence](https://github.com/inkle/ink/blob/master/LICENSE.txt), read 2026-10-28, The licence, in its words: "to use, copy, modify, merge, publish, distribute, sublicense, and/or sell"
- Mirror, [Mirror MIT licence](https://github.com/MirrorNetworking/Mirror/blob/master/LICENSE), read 2026-10-28, Passing its code or content on with the source: "Permission is hereby granted, free of charge, to any person obtaining a copy"
- Mirror, [Mirror MIT licence](https://github.com/MirrorNetworking/Mirror/blob/master/LICENSE), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 2,366 characters long.
- Mirror, [Mirror MIT licence](https://github.com/MirrorNetworking/Mirror/blob/master/LICENSE), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 2,366 characters long.
- Mirror, [Mirror MIT licence](https://github.com/MirrorNetworking/Mirror/blob/master/LICENSE), read 2026-10-28, The licence, in its words: "Permission is hereby granted, free of charge, to any person obtaining a copy"
- OGRE, [OGRE licensing page](https://www.ogre3d.org/licensing), read 2026-10-28, Passing its code or content on with the source: "The only condition is that you distribute the license text included in our distribution with any software that uses OGRE."
- OGRE, [OGRE licensing page](https://www.ogre3d.org/licensing), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 4,114 characters long.
- OGRE, [OGRE licensing page](https://www.ogre3d.org/licensing), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 4,114 characters long.
- OGRE, [OGRE licensing page](https://www.ogre3d.org/licensing), read 2026-10-28, The licence, in its words: "The only condition is that you distribute the license text included in our distribution with any software that uses OGRE."
- Open 3D Engine, [O3DE licence file](https://github.com/o3de/o3de/blob/development/LICENSE.txt), read 2026-10-28, Passing its code or content on with the source: "The default license for Open 3D Engine is the Apache License, Version 2.0"
- Open 3D Engine, [O3DE licence file](https://github.com/o3de/o3de/blob/development/LICENSE.txt), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 2,420 characters long.
- Open 3D Engine, [O3DE licence file](https://github.com/o3de/o3de/blob/development/LICENSE.txt), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 2,420 characters long.
- Open 3D Engine, [O3DE licence file](https://github.com/o3de/o3de/blob/development/LICENSE.txt), read 2026-10-28, The licence, in its words: "you may elect at your option to use the Open 3D Engine under the MIT License"
- RPG Maker, [RPG Maker EULA](https://www.rpgmakerweb.com/eula), read 2026-10-28, Passing its code or content on with the source: "or enabling of transmission of This Software in whole or in part without the prior written consent of the Company"
- RPG Maker, [RPG Maker EULA](https://www.rpgmakerweb.com/eula), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 20,936 characters long.
- RPG Maker, [RPG Maker EULA](https://www.rpgmakerweb.com/eula), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 20,936 characters long.
- RPG Maker, [RPG Maker EULA](https://www.rpgmakerweb.com/eula), read 2026-10-28, The licence, in its words: "Extraction of Company Programs or Company Assets from User Games and Distribution, etc."
- Unity Asset Store, [Asset Store Terms of Service and EULA](https://unity.com/legal/as-terms), read 2026-10-27, Passing its code or content on with the source: "to reproduce, publicly display, publicly perform, transmit, and distribute the Asset as incorporated and embedded in that Licensed Product;"
- Unity Asset Store, [Asset Store Terms of Service and EULA](https://unity.com/legal/as-terms), read 2026-10-27, Using it to train AI: "(g) use the Unity Asset Store or Assets for purposes such as training an artificial intelligence or machine learning model without the express consent from the Provider and/or Unity."
- Unity Asset Store, [Asset Store Terms of Service and EULA](https://unity.com/legal/as-terms), read 2026-10-27, What the developer owns: The licence document is silent here; it was read in full on 2026-10-27, 51,499 characters long.
- Unity Asset Store, [Asset Store Terms of Service and EULA](https://unity.com/legal/as-terms), read 2026-10-27, The licence, in its words: "(g) use the Unity Asset Store or Assets for purposes such as training an artificial intelligence or machine learning model without the express consent from the Provider and/or Unity."
- Unity, Editor, [Unity Editor Software Terms](https://unity.com/legal/editor-terms-of-service/software), read 2026-10-28, Passing its code or content on with the source: "you may distribute the Unity Runtime as an integrated part of your Projects, solely as embedded or incorporated into your Projects"
- Unity, Editor, [Unity Editor Software Terms](https://unity.com/legal/editor-terms-of-service/software), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 31,160 characters long.
- Unity, Editor, [Unity Editor Software Terms](https://unity.com/legal/editor-terms-of-service/software), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 31,160 characters long.
- Unity, Editor, [Unity Editor Software Terms](https://unity.com/legal/editor-terms-of-service/software), read 2026-10-28, The licence, in its words: "you may distribute the Unity Runtime as an integrated part of your Projects, solely as embedded or incorporated into your Projects, and solely to third parties to whom you license or sell your Projects"
- Unity, packages, [Unity Package Distribution License](https://unity.com/legal/licenses/unity-package-distribution-license), read 2026-10-28, Passing its code or content on with the source: "Exercise of the distribution license granted under this License is limited to distribution of the Work as binaries integrated with your Project Content"
- Unity, packages, [Unity Package Distribution License](https://unity.com/legal/licenses/unity-package-distribution-license), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 7,974 characters long.
- Unity, packages, [Unity Package Distribution License](https://unity.com/legal/licenses/unity-package-distribution-license), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 7,974 characters long.
- Unity, packages, [Unity Package Distribution License](https://unity.com/legal/licenses/unity-package-distribution-license), read 2026-10-28, The licence, in its words: "Exercise of the distribution license granted under this License is limited to distribution of the Work as binaries integrated with your Project Content"
- Valve, Steamworks SDK, [Steamworks SDK Access Agreement](https://partner.steamgames.com/documentation/sdk_access_agreement), read 2026-10-28, Passing its code or content on with the source: "reproduce and distribute the part of the SDK provided inside the folder named redistributable_bin"
- Valve, Steamworks SDK, [Steamworks SDK Access Agreement](https://partner.steamgames.com/documentation/sdk_access_agreement), read 2026-10-28, Using it to train AI: The licence document is silent here; it was read in full on 2026-10-28, 8,804 characters long.
- Valve, Steamworks SDK, [Steamworks SDK Access Agreement](https://partner.steamgames.com/documentation/sdk_access_agreement), read 2026-10-28, What the developer owns: The licence document is silent here; it was read in full on 2026-10-28, 8,804 characters long.
- Valve, Steamworks SDK, [Steamworks SDK Access Agreement](https://partner.steamgames.com/documentation/sdk_access_agreement), read 2026-10-28, The licence, in its words: "use and locally reproduce the SDK in source code form, solely to develop the Licensee Software"

## Read and set aside

- [Bink licensing (RAD Game Tools)](https://www.radgametools.com/sales.htm): a sales page listing Bink and RAD products; it carries no licence terms
- [Bink Video (RAD Game Tools)](https://www.radgametools.com/bnkmain.htm): a product page for Bink Video; it carries no licence terms
- [Photon terms (Exit Games)](https://www.photonengine.com/terms): 2,000 characters of Photon's terms index; the terms themselves were not in the read
- [Live2D SDK Release License](https://www.live2d.com/en/sdk/license/): a page listing Live2D licence types; the licence text itself was not in the read

## Methodology

Each licence's own engines', middleware makers' and asset stores' own licences were read through estate-fetch and stored whole (sha256 on every row). For every licence document, four questions were answered from its own words: passing its code or content on with the source, using it to train AI, what the developer owns, the licence, in its words. Every stated answer carries the sentence it rests on, checked against the stored text; 'not stated' means the licence document read does not address the question. A licence with several licence documents reads 'varies' where they disagree. 19 licences, 20 licence documents.

## Sources

- [Unreal Engine EULA](https://www.unrealengine.com/en-US/eula/unreal) (read)
- [Unreal Engine content EULA](https://www.unrealengine.com/en-US/eula/content) (read)
- [Unity Editor Software Terms](https://unity.com/legal/editor-terms-of-service/software) (read)
- [Unity Package Distribution License](https://unity.com/legal/licenses/unity-package-distribution-license) (read)
- [Unity Asset Store Terms of Service and EULA](https://unity.com/legal/as-terms) (read)
- [Fab EULA](https://www.fab.com/eula) (read)
- [CRYENGINE Terms of Service](https://www.cryengine.com/terms) (read)
- [O3DE licence (Apache 2.0)](https://github.com/o3de/o3de/blob/development/LICENSE.txt) (read)
- [Defold License](https://defold.com/license/) (read)
- [Bevy licence (MIT)](https://github.com/bevyengine/bevy/blob/main/LICENSE-MIT) (read)
- [OGRE licensing](https://www.ogre3d.org/licensing) (read)
- [RPG Maker EULA](https://www.rpgmakerweb.com/eula) (read)
- [FMOD licensing](https://www.fmod.com/licensing) (read)
- [FMOD legal information](https://www.fmod.com/legal) (read)
- [Havok terms of use](https://www.havok.com/terms-of-use/) (read)
- [Bink licensing (RAD Game Tools)](https://www.radgametools.com/sales.htm) (not-terms)
- [Bink Video (RAD Game Tools)](https://www.radgametools.com/bnkmain.htm) (not-terms)
- [Photon terms (Exit Games)](https://www.photonengine.com/terms) (not-terms)
- [Spine Runtimes License](https://esotericsoftware.com/spine-runtimes-license) (read)
- [Spine Editor License](https://esotericsoftware.com/spine-editor-license) (read)
- [Live2D SDK Release License](https://www.live2d.com/en/sdk/license/) (not-terms)
- [Steamworks SDK Access Agreement](https://partner.steamgames.com/documentation/sdk_access_agreement) (read)
- [ink licence (MIT, inkle)](https://github.com/inkle/ink/blob/master/LICENSE.txt) (read)
- [Mirror networking licence (MIT)](https://github.com/MirrorNetworking/Mirror/blob/master/LICENSE) (read)

## Cite or embed

- 7 of 19 engine, middleware and asset store licences we read let their code or content leave a studio only compiled into the shipped game, read 28 October 2026.
- Passing its code or content on with the source, by licence: only compiled into the shipped game 7 of 19, allowed, with its open licence attached 6 of 19, not allowed without the vendor's permission 4 of 19, only to someone holding the vendor's own licence 2 of 19 (19 licences, read 28 October 2026).
- Using it to train AI, by licence: not stated 15 of 19, barred 3 of 19, needs the vendor's or provider's consent 1 of 19 (19 licences, read 28 October 2026).
- What the developer owns, by licence: not stated 16 of 19, the developer's own work, not the vendor's 3 of 19 (19 licences, read 28 October 2026).
- The licence, in its words, by licence: stated 19 of 19 (19 licences, read 28 October 2026).

Cite as: "What a game's source tree lets a seller pass on", updated 2026-10-28, https://sellgamesourcecode.com/datasets/game-engine-code-pass-on-terms/.

CSV: https://sellgamesourcecode.com/datasets/game-engine-code-pass-on-terms.csv
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