AI voice for games: licensing, quality and union rules

The short answer

AI voice is useful in games for placeholders, large volumes of incidental lines, real-time dialogue and accessibility, but principal characters still benefit from human performances. In 2026, the rules matter as much as the technology: the 2025 SAG-AFTRA video game agreement requires informed consent for AI use of performers' voices and sets minimum pay for replicas, Steam requires developers to disclose AI-generated content, and every tool has its own licence terms. Use AI voice with consent, disclosure and legal review.

Where AI voice fits

For AI-driven characters, see our article on AI NPCs.

The 2025 SAG-AFTRA agreement

In 2025, SAG-AFTRA members ratified a new Interactive Media Agreement with 95.04% voting in favour, ending the video game performers' strike. For AI, reports of the deal highlight that it:

• Requires informed consent for each AI use of a performer's voice, likeness and movement, with a reasonably specific description of how a digital replica will be used.
• Lets performers suspend consent for generating new replica material during a strike.
• Sets pay of at least 7.5 times minimum scale when a replicated performer is used for real-time generation, such as an AI chatbot character.

If you work with union performers or with companies that are signatories, these terms apply. Even outside union work, they show what professional practice now expects.

Platform disclosure

Steam asks developers to disclose AI use in the content survey, separating pre-generated content made during development from live-generated content created while the game runs. Live-generated content needs described guardrails to prevent illegal content, much of the disclosure appears on the store page, and players can report problems. Games that do not disclose accurately risk removal. Check each store's current rules before release.

Licensing and rights

• Tool licences: confirm commercial use is allowed, and whether the provider offers any indemnity.
• Training data: prefer tools that are clear about where voice data came from and how voices were licensed.
• Voice cloning: clone a real person's voice only with their written, specific consent and agreed payment.
• Copyright: protection for purely AI-generated material is limited in some countries; the U.S. Copyright Office's guidance explains the current position.

Real-time AI voices need guardrails

When a character speaks lines generated during play, you no longer approve every line before release. That needs content filters on the text before it becomes speech, limits on topics, logging for review, and a way for players to report problems. Steam explicitly asks developers to describe these guardrails for live-generated content. Test with adversarial players who try to make characters say things they should not.

Working with actors and AI together

Many studios now combine both: actors record principal roles, while AI or text-to-speech fills incidental or procedural lines in a clearly different role. Be transparent with performers about how their recordings will be used, keep AI use within what contracts allow, and credit everyone properly. Good relationships with performers are worth more than the savings from cutting corners.

Quality limits to plan for

• Emotional delivery across long scenes can sound flat or inconsistent.
• Pronunciation of invented names and terms needs manual correction.
• Consistency of a character's voice across thousands of lines takes careful tooling.
• Players increasingly notice and comment on synthetic voices, positively or negatively.

A responsible approach

1. Use human actors for principal roles and emotionally important scenes.
2. Use AI voice for placeholders, incidental lines and accessibility where it genuinely helps.
3. Get written, specific consent and agree pay for any use of a real performer's voice.
4. Disclose AI use on stores and in credits where required.
5. Add guardrails and moderation for any live-generated speech.
6. Get legal review of contracts and tool licences before release.

Other jurisdictions

Rules differ by country. Some places give people rights over their voice and likeness under publicity or personality laws, and new AI laws, such as the EU AI Act, include transparency obligations for synthetic content. If your game launches internationally, get advice on the markets that matter most to you.

Budgeting audio

Voice-over is often one of the largest audio and localisation costs, which is why AI voice is tempting. A mixed approach, actors for key roles and carefully licensed AI or text-to-speech for the long tail, can reduce costs without the risks of replacing performers outright. See our guides to game audio and localization.

Working with us

We help teams plan audio pipelines that combine actors, sound design and responsibly used AI tools. See AI game development or request a quote. This article is general information, not legal advice.

Sources: TheWrap: SAG-AFTRA video game deal details · Reuters via AOL: video game actors pass agreement · SAG-AFTRA: interactive media contracts · VGC: Steam AI disclosure · U.S. Copyright Office: copyright and AI. Checked October 20, 2026.

Related: AI game development · Unity game development · Get a quote