Game Asset Licenses Explained (CC0, CC-BY, Royalty-Free)

Last reviewed: November 8, 2026.

A free download tells you the price. Its license tells you whether you can put it in a game, modify it, share the source files, or use it in a trailer. For a typical commercial game, CC0 and CC BY assets are useful starting points; a marketplace license can also work when it covers your release and distribution method. None of these labels clears every possible right in the asset.

This guide explains the distinctions that affect game development, with links to the official terms and a recordkeeping workflow you can use before importing a file. It is general information; ambiguous combinations, third-party brands, and unusual distribution models need a project-specific assessment.

Why Licenses Matter

Start with three separate questions:

1. Who made the asset? Find the original creator or an authorized distributor. A reupload cannot grant rights the uploader does not have.
2. What use is permitted? Shipping a game, redistributing a starter project, uploading to an AI tool, and selling a soundtrack are different uses.
3. What other rights are involved? A model's copyright license does not necessarily cover a logo on its texture, a recognizable person, a character from another game, or music captured in a field recording.

Creative Commons explains that its licenses grant only rights the licensor has authority to grant. Read the license scope alongside the asset's own page, rather than treating a search filter as a clearance certificate.

License Quick Reference

Label on the asset	Commercial game use	Main obligation or question
CC0	Permitted under the dedication	Check provenance and rights outside copyright; credit is optional
CC BY	Permitted	Attribute, link the license, identify changes, preserve required notices
CC BY-SA	Permitted	Attribution plus ShareAlike for shared adaptations; assess how you combine works
CC BY-NC	Not licensed for commercial use	A zero-price download or game does not settle whether the use is commercial
CC BY-NC-SA	Not licensed for commercial use	NC and ShareAlike both apply
CC BY-ND	Unadapted sharing is permitted, including commercially	Sharing adaptations is not permitted; music synchronization needs particular care
Royalty-free / custom license	Depends on the actual agreement	Check permitted products, seats, redistribution, term, and exceptions
Editorial only	Do not assume entertainment-game permission	Read the restricted purpose and obtain any needed separate rights
MIT / Apache-2.0	Permitted for covered material	Preserve license and notices; check separately licensed assets
GPL	Commercial distribution is possible	Copyleft and source obligations depend on version and what you distribute

The following sections link each summary to its governing text. Keep the exact version, such as CC BY 3.0 or CC BY 4.0, in your records.

Creative Commons Licenses

CC0 - Public Domain Dedication

CC0 is a dedication of copyright and related rights to the public domain to the extent legally possible, with a fallback license. It permits copying, editing, distribution, and commercial use without requiring attribution. It does not grant trademark or patent rights, clear another person's privacy or publicity rights, or warrant that an upload is legitimate. Do not imply the creator endorses your game. See the CC0 deed.

For example, a creator's original CC0 wooden crate is a straightforward prop candidate. A CC0-tagged model of a famous film character still raises questions about the depicted character. Neither the tag nor a payment resolves that distinction.

Useful provider statements include Kenney's asset support page, Poly Haven's asset license, Quaternius's FAQ, and ambientCG's license. Their statements concern the asset material they specify; they are not permission to copy every logo, website image, or unrelated product on those sites.

CC-BY - Attribution

CC BY permits commercial use, adaptation, and redistribution. Under CC BY 4.0, recipients must receive appropriate credit, a license link, and an indication of changes. Supplied copyright, license, and disclaimer notices also matter. The license prohibits additional legal or technical restrictions that prevent recipients exercising its licensed rights.

Use a credits entry with enough information to locate the actual work:

"Forest Footstep" by Example Artist
Source: https://example.com/sounds/forest-footstep
License: CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/
Changes: trimmed, equalized, and converted to mono.

This is a fictional template. Replace every field and retain any supplied notices. A generic “sounds from Freesound” line loses the creator, file, and license version. A “special thanks” line is not a substitute for required attribution.

The CC BY 4.0 legal text, section 3, allows a reasonable manner of attribution appropriate to the medium, including a link to the required information. Make your credits available to recipients of the game; do not rely only on a private development document. If you distribute through a platform with DRM or restrictive terms, assess the actual restrictions on the CC material.

CC-BY-SA - Attribution ShareAlike

CC BY-SA 4.0 permits commercial use. When you share an adaptation, its contributions must use the required ShareAlike terms, which can include a compatible license recognized by Creative Commons. Attribution and the prohibition on additional restrictions still apply.

The key question is what constitutes the adaptation. Keeping separate works in a collection is different from combining them into a new adapted work. The presence of one SA file does not automatically dictate the license of every independent file in a project. It is also unsafe to promise that SA can never reach beyond an edited asset. Creative Commons explains this collection/adaptation distinction.

Music deserves special attention: the CC BY-SA 4.0 definition of Adapted Material treats synchronization of music with moving images as an adaptation. Check this before selecting an SA soundtrack for a game or trailer. A shared adaptation does not escape its obligations merely because it is bundled inside a game rather than downloaded separately.

CC-BY-NC - Attribution NonCommercial

CC BY-NC 4.0 restricts use to noncommercial purposes. Its definition focuses on whether the use is primarily intended for commercial advantage or monetary compensation.

A paid game or ad-supported release should not rely on NC permission. A free game can still promote a business or paid product. Donations, a portfolio, a sponsored jam, or educational use require context; neither the developer's nonprofit status nor the absence of a price tag is a universal answer. If commercial release is a realistic next step, choose another asset or obtain a separate license covering that use before building around it.

CC-BY-NC-SA - Attribution NonCommercial ShareAlike

CC BY-NC-SA combines both conditions. Giving credit and sharing your modifications does not remove the NC restriction. Record both requirements; do not shorten the label to “Creative Commons” in your asset register.

CC-BY-ND - NoDerivatives

CC BY-ND 4.0 allows sharing an unadapted work, including commercially, but does not permit sharing adapted material. Merely changing file format is not, by itself, an adaptation. Editing artwork or synchronizing music can raise different questions. Prefer a license that expressly accommodates the changes your production needs rather than assuming an ND track is usable because you kept its melody intact.

Royalty-Free Licenses

What "Royalty-Free" Actually Means

Royalty-free describes a licensing arrangement without recurring royalties for the permitted uses. It is not a standardized set of permissions, a public-domain dedication, or a promise of unlimited use forever. A license may be free, purchased once, or tied to a subscription; the actual agreement determines which rights continue and when.

The practical questions are whether it covers your game, who on the team may access the files, how players receive them, and what happens when the subscription ends. Keep the applicable agreement with the receipt or download record.

Standard Royalty-Free Terms

There is no single standard. Compare these fields before choosing an asset:

Check	Why it matters
Finished game versus source/template	Permission to embed an asset may exclude a public project repository or game-making tool
Team and contractor access	A personal license may not cover every collaborator
Extraction and redistribution	Browser files and downloadable mods may expose the original resource
Platforms, territory, and media	A video license may exclude games; a game license may not cover an album
Subscription expiry	Previously published work and future projects can be treated differently
Restricted uses	AI training, generated derivatives, trademarks, and other uses may have separate terms

An asset being technically downloadable from your game does not, by itself, answer whether you have satisfied a contract's protection requirements. Check your packaging against the wording rather than promising impossible extraction prevention.

Synty Studios License

Synty's one-time purchase license and license overview distinguish acquisition routes and uses. The current one-time terms include team-seat requirements and prohibit several AI-related and game-creation-software uses. Purchases through the Unity Asset Store are excluded from that agreement's definition of Store. Do not transfer the terms of one purchase channel to another, or assume permission to use a pack in an ordinary game also covers an AI game builder.

CGTrader Royalty-Free License

CGTrader's terms, section 21A focus on incorporation into a larger product and restrict standalone redistribution. Section 21B adds a No AI variant. Read the selected model's license and any depicted-IP issues as well as the site's royalty-free guidance.

TurboSquid 3D Model License

TurboSquid's 3D Model License describes permitted creations, restrictions, and editorial labels. A branded object can involve rights beyond the model file. A higher-priced license is not a substitute for permission from the owner of depicted intellectual property.

Fab Standard License

The Fab Standard License summary permits commercial projects and compatible tools beyond Unreal Engine, while restricting standalone redistribution. Fab also offers CC BY content. Record which license and acquisition tier applied to the specific item; a free promotion is a price, not a change to CC0.

Editorial Use Only

What It Means

Editorial licenses usually restrict the context in which an asset may be used. Read the provider's wording: news, academic, and documentary permissions are not a general entertainment-game grant. An editorial work can itself earn money, so “editorial” and “noncommercial” are not interchangeable labels across all providers.

Why Assets Get This Label

A model may depict a brand, copyrighted character, or real person that the model's seller cannot fully license. TurboSquid explains the distinction between a model and its associated brands or other depicted IP.

Example

A recognizable branded racing car might be offered as a well-made model with an editorial label. Buying the mesh is not evidence that your racing game has the car manufacturer's authorization. Choose a generic original vehicle, or resolve the needed rights for the intended use before commissioning the rest of the scene.

Software Licenses (MIT, GPL, Apache)

MIT License

The MIT license permits commercial use and modification of the covered software while requiring its copyright and permission notice in copies or substantial portions. Include the complete applicable notice in your distributed license materials; a truncated quotation of the first sentence is insufficient.

A repository's code license does not necessarily cover its demonstration models, music, fonts, or textures. Inspect the asset directory and acknowledgements. This matters when copying a full example project instead of just its code.

Apache License 2.0

Apache-2.0 includes copyright and patent grants with conditions. Distribution requires the license, retention of relevant notices, prominent notices in modified files, and applicable NOTICE information when supplied. It does not grant general trademark permission. Use the actual upstream notice files rather than substituting an MIT-style credit line.

GPL (GNU General Public License)

GPL permits commercial distribution; it is not a noncommercial license. Its source and copyleft requirements depend on the version and the relationship between the works being distributed. The GNU GPL v2 text and GNU FAQ distinguish an aggregate of separate works from a combined work.

For GPL artwork or code in a proprietary game, resolve the scope, preferred editable source, notices, and distribution obligations before release. Do not assume either “one GPL asset opens all code” or “art can never affect the surrounding work.” A GPL editor used to draw original sprites is a different situation from distributing GPL-covered artwork with your game.

Practical Guidelines

Choosing Assets by License (Recommended Order)

Choose by your distribution plan, rather than ranking licenses as universally safe:

1. For a normal game with simple credits, start with original CC0 or CC BY assets from identifiable creators.
2. For a public source project, verify that each asset can be redistributed with the repository.
3. For a marketplace pack, check seats, end-product requirements, and extraction restrictions.
4. For SA, NC, ND, or GPL content, resolve the relevant obligations before committing production work.
5. For missing or contradictory terms, use a clearly licensed substitute until the rights are established.

Building a Credits System

Keep a development register and generate a readable release credits file from it. Useful fields are:

Asset ID and local filename:
Original title and creator:
Original item URL:
Download date and pack/version:
License name, version, and URL:
Saved license file / receipt:
Required notices and attribution:
Modifications made:
Where used: game / trailer / website / source repository
Separate permissions, if any:

A small team can use a CSV or Markdown file. The important part is that a renamed file remains connected to its origin. Keep licenses beside source downloads and review the final packaged credits, not just the development copy.

Handling Mixed Licenses

Each file retains its applicable terms. When a pack is genuinely offered under alternative licenses, record the option you use. When a pack contains multiple creators or files with different licenses, do not treat those as alternatives. Preserve the mapping from file to creator and permission.

Red Flags to Watch For

Pause on contradictory license fields, game-ripped files, missing creator identity, or a familiar brand presented without relevant rights information. Professional quality alone is not a red flag: many artists deliberately release excellent free assets. A familiar marketplace name alone is not proof of clearance either.

License Compatibility

Combining Assets in One Project

Situation	What to resolve
Separate CC0 and CC BY files	Credit the BY work and retain its required notices
Editing a BY-SA texture	Determine the adaptation and its distribution terms
Mixing BY-SA and NC material into one adaptation	Check license compatibility; do not assume one restriction absorbs the other
Adding NC audio to an otherwise commercial game	The NC permission does not authorize that use; the other files do not cure it
Shipping marketplace assets in an open repository	Confirm source redistribution, not just finished-game permission
Combining code and art under different licenses	Track the code and each asset separately, then assess any combined-work questions

Key Rule

There is no universal “the most restrictive license wins” formula. Some combinations are possible with separate obligations; others need another permission or a replacement asset. Use the Creative Commons adaptation guidance for the specific licenses involved.

Frequently Asked Questions

Can I use CC-BY assets in a commercial game?

Yes, within the license and other applicable rights. Follow the exact version's attribution, notices, change-marking, and distribution requirements; use the template above as a starting point.

Do I need to open-source my game if I use CC-BY-SA assets?

Not automatically. Whether your use creates an adaptation or includes separate works matters. ShareAlike cannot be dismissed merely because the asset is embedded. Review the soundtrack and other closely combined content before making a blanket promise about your game's license.

What if I modified a CC-BY asset beyond recognition?

Substantial editing does not automatically remove the original license. Track the source and modifications so that you can preserve required credit and notices.

Can I use Freesound audio in a commercial game?

Check the individual sound. Freesound offers CC0, CC BY, CC BY-NC, and some legacy Sampling+ uploads. Its FAQ also warns that user uploads may sometimes contain unauthorized material. A license filter is a useful shortlist, followed by a file-level check.

Is a free game with ads "commercial"?

Treat an ad-supported game as requiring commercial-use permission. For other borderline cases, apply the license's definition to the actual use rather than equating “free to play” with noncommercial.

Can I use CC0 assets and then sell them?

CC0 permits commercial reuse and redistribution of the covered rights. It does not make you the original creator, supply exclusivity, or clear unrelated rights in depicted content. Keep provenance even when no credit is required.

What about AI-generated assets?

Check the generator's output terms, the rights in your inputs, and the content you receive. An MIT license on inference code is not automatically a license for model weights or a guarantee about output.

The U.S. Copyright Office's January 2025 report distinguishes human-authored contributions from purely generated material; prompts alone generally do not establish authorship. That U.S. copyrightability guidance does not establish worldwide ownership or prove that an output cannot infringe someone else's rights. For Cinevva, read generation rights and the relevant tool page.

Do I need a lawyer?

Get qualified advice when you cannot resolve a material license question, particularly combined SA/GPL works, branded or likeness-based content, an asset resale service, or a publisher's clearance requirements. A clear asset register makes that review more efficient.

What licenses does OpenGameArt allow, and can I use its assets commercially?

OpenGameArt submissions carry their own license information. Read the selected submission and its attribution instructions rather than treating the whole site as CC0. Its CC BY, CC BY-SA, OGA-BY, and GPL options have different obligations even though commercial use can be permitted. Start with the site's FAQ.

What is the OGA-BY license?

The OGA-BY 4.0 FAQ describes a CC BY-derived license that removes the restriction on technical measures preventing redistribution. It is a separate license, not endorsed by Creative Commons. Preserve the correct OGA-BY version and required attribution.

Are Kenney assets really CC0 and free for commercial use?

Kenney confirms that game assets on its asset pages are CC0 and need no attribution. Keep the included license; the support page separately reserves the Kenney logo for official projects.

Is Quaternius CC0?

Quaternius's FAQ identifies its models as CC0 and permits commercial use and modification. Keep the specific pack's included terms and file information with your download.

Which Freesound licenses allow commercial use?

CC0 and CC BY are the usual choices, subject to the relevant conditions and any other rights. CC BY-NC does not grant commercial permission; older Sampling+ files need their own review.

Do I have to credit or add "special thanks" under a permissive license?

Follow the actual license. CC0 does not require it; CC BY requires attribution; MIT requires its notice. Optional thanks can be added separately from mandatory license information.

What's the difference between CC BY 3.0 and CC BY 4.0 for game assets?

Both permit commercial reuse with conditions. Keep the version attached to the asset: the 3.0 deed and 4.0 legal text differ in attribution details and breach remedies. Do not relabel an older asset as 4.0 just because it is newer.

Attribution Templates

Simple Credits File

ASSET CREDITS

Crate Pack — Example Artist
Source: https://example.com/crate-pack
CC0 1.0 — https://creativecommons.org/publicdomain/zero/1.0/
Optional credit; recolored for this game.

Forest Footstep — Example Sound Artist
Source: https://example.com/forest-footstep
CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/
Changes: trimmed and equalized.

Detailed Attribution (CC-BY)

Add supplied copyright/disclaimer notices, previous modification notices, and any designated attribution parties to the applicable entry. Include the title as a useful identification practice and when the license version requires it.

MIT License Inclusion

Copy the full original copyright and license text into the release's third-party notices. Confirm it survives bundling and is accessible to recipients.

Summary

Choose the asset and distribution method together. Save the exact permission, record the creator and source, preserve required notices, and verify the files and credits that actually ship. CC0 can simplify copyright obligations; it does not replace provenance or third-party-rights checks.

Resources

• Creative Commons license chooser and FAQ
• CC0 deed and CC BY 4.0 legal code
• OpenGameArt OGA-BY explanation
• MIT license and Apache-2.0

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