If you're looking for a service to create realistic voices for your game characters, PlayHT is definitely worth a look. It has more than 600 ultra-realistic AI voices in dozens of languages and accents, with options for custom pronunciation, voice inflection, real-time voice cloning and API access for easy integration into live streams and games. PlayHT also has an eye on ethics and safety, with a free tier and several pricing options.
Another service worth a look is Resemble, which offers hyper-realistic AI voices with options for voice cloning, speech-to-speech conversion and support for 149 languages. It has flexible pricing and strong integration options, including Python, NodeJS, Unity and REST APIs, so it can be used in a variety of situations, including games and entertainment.
If you're looking for something more geared toward game development, EasyDX has a simple interface to create unique character voices in more than 25 languages. It offers voice cloning, a library of pre-made voices and an upcoming bulk import option. EasyDX is designed to simplify scriptwriting and audio production, which could be useful for game developers.
Last but not least, DeepZen offers high-quality audio content with human emotion and intonation, which can be useful for game characters that need to persuade or entertain. It can be integrated with Unreal Engine and Unity, which is convenient for video game developers. With flexible pricing and a focus on making audio content accessible and affordable, DeepZen could be a good option for your project.