Generative AI technologies are revolutionizing the creation of Non-Player Character (NPC) voices in video games, eliminating the need for traditional voice actors and offering game developers enhanced efficiency, creative freedom, and global accessibility. Platforms such as ElevenLabs, Replica Studios, Speechify, PlayHT, Synthesia, Murf.ai, and Listnr are highlighted for their advanced text-to-speech capabilities, extensive voice libraries, and customizable features that cater to diverse gaming needs. These tools allow developers to create lifelike, emotionally resonant voices that enhance the narrative depth and player immersion in games while offering multilingual support to ensure global reach. Despite potential limitations like cost and customization challenges, these AI voice generators present a cost-effective solution for indie developers and established studios alike, significantly reducing the time and labor involved in NPC voice production. As gaming becomes more interactive and immersive, choosing the right AI voice generation platform is crucial for crafting engaging narratives and shaping the future of game development.