Game Characters and IP Protection

The process of cultivating a video game fully is truly inspiring. The art, music, and characters being able to work so well is an art form. Copyright protection of the game and game characters is important to game developers so they may capitalize on their work.

Protection of Video Game Characters

For a video game, copyright law protects the original expression of ideas, including the underlying code as a literary work. This includes the visual and audio elements such as art, music, and character designs. Character images can be protected if they reflect original, creative expression and are not generic or stock characters. Typically, if the company that made both types of elements, then it needs to have a copyright for both the audio-visual and code together (Zielaznicki 2023). 

Elements like game rules, titles, or gameplay mechanics are not copyrightable, as copyright law protects only how ideas are expressed and not the ideas themselves. “The expression adopted by the programmer is the copyrightable element in a … program” (Maitra, 2015). Once a game is released to the public, copyright law cannot prevent others from creating a similar game if they do not copy the original game's protected expressions such as its code, characters, or artwork.

Trademark law can also protect video game characters when they are used as identifiers of a brand or source of goods, such as mascots or icons associated with a specific game series or company. If a character is used in association with a game, service, or merchandise, it can be trademarked. For example, “Sonic the Hedgehog is a video game character that Sega Corporation has registered with the USPTO as a design mark … incorporated into the logo design of the series name” (Ziealaznicki 2023). The character needs to make a clear connection between the character and the software for trademark protection. An example is a mascot “centrally depicted on the launch screen, website, or other marketing materials for the video game” (Zielaznicki 2023). 

Natalia Martinsson told us how she creates characters based on the “flavors” of the characters for her games Little Misfortune and Fran Bow.

Why is proper IP creation necessary? 

To prevent others from using characters similar to a created one, the character must be sufficiently distinct. Proper IP creation is crucial not only for claiming ownership but also for ensuring the creator retains control over how their work is used. Without this protection, other companies or individuals may exploit the work. Such exploitation may include duplicating, selling, or incorporating the creator’s assets into other projects without permission (Hill 2021). Creators can apply copyright notices and licenses to deter infringement and define lawful use of their intellectual property. This is especially relevant in video games, where End User License Agreements (EULAs) outline the terms under which users may access and use game content. Such agreements can also help prevent unauthorized data mining, enhancing security, especially against AI models that may extract and misuse character data (Irvin 2023).

Another reason proper IP creation is necessary is to ensure that game characters are independently protectable under copyright law. For a character to qualify for copyright protection, it must be sufficiently delineated and not be a stock or generic figure. Courts often apply the “story being told” test, which evaluates whether a character is essential to the narrative and is distinct enough to be protectable (Crown LLC 2021). This ensures protection is granted only to characters with original, specific traits rather than those based on common tropes, such as the archetypal wise old man. These legal tests, originally applied to literary or cinematic characters, are also relevant to characters in video games.

For a game, this would mean that not every character is immediately protected. For instance, in a war-themed game, generic soldiers would not typically qualify for protection unless they are given detailed backstories or unique characteristics. A captain with a proper name and backstory would have a higher chance of being protected. A character who drives the narrative, possesses a distinctive personality, and has a unique visual design is more likely to receive strong legal protection. For example, James Bond remains protectable despite being portrayed by multiple actors, as his character is consistently defined and distinct even though he represents a common spy archetype (Crown LLC 2021).

Open Source and Creative Commons Games

Angelo Alcid explained how Rooster Teeth’s property Red vs. Blue uses a license to use assets from the game Halo.

In some cases, game creators choose to make their work more accessible to the public by releasing it under open source or through Creative Commons licenses. These games are still protected by copyright law, but the copyright owners have chosen to grant the public specific rights such as the ability to reuse, modify, or redistribute the game under defined conditions (Hill 2021). For example, a Creative Commons license might allow others to build new games using existing characters or assets, provided they credit the original creator. Likewise, an open source license may allow developers to modify the game’s source code or incorporate it into new projects, depending on the license terms (Hill 2021).

These licensing approaches encourage creative collaboration while still maintaining the original creator's legal rights. Platforms like itch.io allow developers to share or sell open assets, including art packs, sprite sheets, or music loops, which may be available under Creative Commons or permissive commercial licenses. However, it is essential to note that these resources are only usable to the extent allowed by their specific license and users must respect attribution, non-commercial, or share-alike conditions where applicable. 

Modding with Game Intellectual Properties

Separate from open source licensing is the widespread practice of modding, where fans modify existing games to add or change gameplay features, characters, or environments. Typically, modding does not involve open source or Creative Commons licensing. Instead, it depends on the permissions granted by the game’s End User License Agreement (EULA) or the company’s community guidelines.

For example, Valve’s “Workshop” platform encourages users to create and share content for games like Team Fortress 2 or Skyrim, as long as the content complies with Valve’s terms (Valve Corp. n.d.). This open system has fostered thriving modding communities, where users can develop new weapons, characters, maps, and even entirely new game modes. This can lead to issues with user generated content and whether the mod creator or game creator gets control of the made asset. Other companies differ on this, making strict regulations through their EULA. 

For example, Nintendo's EULA explicitly prohibits modifying its software, reinforcing its strict stance against unauthorized alterations. It states that users may not "publish, copy, modify, reverse engineer, lease, rent, decompile, disassemble, distribute, offer for sale, or create derivative works" of any Nintendo Account Services. This means that adding custom characters, altering game mechanics, or modifying assets without Nintendo’s consent is a direct violation of its terms. They have the right to "render the Nintendo Account Services and/or the applicable Nintendo device permanently unusable in whole or in part" if users fail to comply with these restrictions (Nintendo of America 2025b). There are certain cases where Nintendo allows additional content to be suggested through them that are not affiliated with their IPs. These are called “Submissions” and if mailed to Nintendo, would “automatically become the sole property of Nintendo.” They have the right to use it for all IP rights and would not need to notify nor give compensation to the original creator (Nintendo of America 2025a).

Dan Salvato of Team Salvato told us about the boundaries for how fans can use his modding license for Doki Doki Literature Club.

References

Crown LLP. (2021, December) Copyright Infringement and Protection of Fictional Characters. Crown Attorney’s at Law https://crownllp.com/blog/copyright-protection-and-infringement-of-fictional-characters/ 

Hill, Cindy (2021) University of North Texas Libraries. Copyright for game development. UNT Libraries. https://guides.library.unt.edu/c.php?g=1005699&p=7291472

Irvin, S., Taub, W., & Choi, J. (2023, September). AI-generated video games are coming: How do game developers protect rights in their IP? Harvard Journal of Sports & Entertainment Law. https://journals.law.harvard.edu/jsel/2023/09/ai-generated-video-games-are-coming-how-do-game-developers-protect-rights-in-their-ip/

Maitra, Sonali (2015) It’s How You Play the Game: Why Videogame Rules Are Not Expression Protected by Copyright Law. American Bar Association. https://www.americanbar.org/groups/intellectual_property_law/resources/landslide/archive/why-videogame-rules-are-not-expression-protected-copyright-law/

Mathur, A. (2025, March 4). Recent developments in AI, art & copyright: Copyright Office report & new registrations. Center for Art Law. https://itsartlaw.org/2025/03/04/recent-developments-in-ai-art-copyright-copyright-office-report-new-registrations/

Nintendo of America Inc. (2025a).Terms of Use. https://www.nintendo.com/us/terms-of-use/ 

Nintendo of America Inc. (2025b). End user license agreement. https://www.nintendo.com/us/eula-update/

Valve Corporation. (n.d.). Rules and guidelines for Steam: Discussions, reviews, and user generated content. Steam Support. https://help.steampowered.com/en/faqs/view/6862-8119-C23E-EA7B

Zielaznicki, Karl. (2023, November 16). IP protection for featured characters in digital and physical media. Troutman Pepper Hamilton Sanders LLP. https://www.troutman.com/insights/ip-protection-for-featured-characters-in-digital-and-physical-media.html