1. [Home](/) [ACE](https://developer.nvidia.com/ace) ACE for Games # NVIDIA ACE for Games NVIDIA ACE is a suite of AI technologies designed to help middleware and game developers build knowledgeable, actionable, and conversational in-game characters. ACE provides ready-to-integrate cloud and on-device AI models for speech, intelligence, and animation. [Get Started ](#section-getting-started "Get Started")[Notify Me](https://developer.nvidia.com/ace-for-games/notify-me "Notify Me") ![A digital human powered by NVIDIA ACE Unreal Engine 5](https://developer.download.nvidia.com/images/ace-for-gamedev/Hiroki1.png) * * * ## Key Benefits ### **Small Models for Gaming** ACE offers small AI models—from speech to vision— built to enhance game characters ### Optimized for On-Device Inference AI models fine-tuned and optimized for gaming hardware, provide high accuracy and low latency within a small memory footprint. ### Inference Alongside Graphics [NVIDIA In-Game Inferencing](https://developer.nvidia.com/rtx/in-game-inferencing) (NVIGI) plugins schedule AI inference for different models and inference backends across complex graphics workloads to maximize performance and the user experience. * * * ## Partner Experiences Powered by AI NVIDIA ACE is being used by industry-leading game developers and ISVs to build autonomous game characters that inhabit living, breathing worlds and AI assistants that provide tips and guidance to gamers and creators. ### Assistants The Total War: PHARAOH AI advisor assists players in learning the game’s many systems and mechanics and is powered by a small on-device language model connected to Total War’s extensive game data. https://www.youtube-nocookie.com/embed/6es-Zvh5bu4?&rel=0 ### Sidekicks Streamlabs and Inworld AI introduce an intelligent streaming assistant that serves as a producer, technical assistant, and 3D sidekick. https://www.youtube-nocookie.com/embed/909h0VZeOMM?&rel=0 ### Teammates KRAFTON’s PUBG introduces Co-Player Characters (CPCs), AI-driven allies that communicate in natural language and act autonomously like human teammates. https://www.youtube-nocookie.com/embed/OdtFL1CDDwc?&rel=0 ### Enemies Wemade Next’s MIR5 introduces AI-powered bosses that continuously learn from previous player tactics to adapt and provide unique fights every run. https://www.youtube-nocookie.com/embed/-8XeiZ4djKw?&rel=0 ### Citizens KRAFTON’s inZOI features Smart Zois, AI-driven agents that plan, act, and reflect on their decisions to create unique character dynamics. https://www.youtube-nocookie.com/embed/Pk9z1upOj3U?&rel=0 ### Characters Dead Meat is a first-of-its-kind murder-mystery interrogation game where players can ask the suspect absolutely anything, in their own words. https://www.youtube-nocookie.com/embed/PFwIVnDU8KM?&rel=0 * * * ## AI NPC Quickstart Guides & Resources ![](https://developer.download.nvidia.com/images/gamedev/ACE_UE_Plugin_04_16x9.gif) ### NPC Building in Unreal Engine 5 - [Building AI NPCs in Unreal Engine 5.7](https://www.youtube.com/watch?v=4syKq_OrbGA) - [Getting Started With NVIDIA Audio2Face-3D Open Source in Unreal Engine 5](https://www.youtube.com/watch?v=-l8kjQUTfQk) - [What's New in RTX for Unreal Engine 5](https://www.youtube.com/watch?v=so9lm3hAHes) ![](https://developer.download.nvidia.com/images/nvidia-unreal-engine-zorah-technology-ari.jpg) ### Custom Engines - [How to Build an Agentic Loop](https://github.com/NVIDIA/game-agent-sdk/blob/main/docs/sphinx/source/agent-deep-dive.md) - [How to Build a RAG Database](https://github.com/NVIDIA/game-agent-sdk/blob/main/docs/sphinx/source/rag-building-a-database.md) - [Building an AI Assistant for Total War: PHARAOH | NVIDIA ACE Developer Deep Dive](https://www.youtube.com/watch?v=X2Bw30BvrHo) - [Game Agent SDK API Deep Dive](https://github.com/NVIDIA/game-agent-sdk/blob/main/docs/sphinx/source/agent-deep-dive.md) ![](https://developer.download.nvidia.com/images/rtx/NVIDIA-ACE-Unreal-Engine-5-Reference.png) ### On-Device Inference - [Bring NVIDIA ACE AI Characters to Games with the In-Game Inferencing SDK](https://developer.nvidia.com/blog/bring-nvidia-ace-ai-characters-to-games-with-the-new-in-game-inference-sdk/) - [How to Minimize Game Runtime Inference Costs with Coding Agents](https://developer.nvidia.com/blog/how-to-minimize-game-runtime-inference-costs-with-coding-agents/) - [PUBG: BATTLEGROUNDS Ally AI Companion Deep Dive | NVIDIA ACE Conversational Pipeline Explained](https://www.youtube.com/watch?v=JaD6ZFNQgU8) * * * ## Build Simple Agents in Unreal Engine 5 For Unreal Engine 5 developers and technical artists, a suite of NVIDIA ACE plugins is available to streamline the end-to-end AI NPC pipeline. They're local, RTX-optimized workflows bundled with ready-to-use models, governed by the MIT license. ### Facial Animation The Audio2Face-3D plugin for Unreal Engine 5, alongside a configuration sample, enhances your Metahuman experience. The Autodesk Maya ACE plugin generates high-quality, audio-driven facial animation offline. [Download Unreal Engine Gaming Sample](https://developer.nvidia.com/downloads/assets/ace/aceunrealsample-1.0.0.7z) [Download Unreal Engine 5.6 Plugin](https://developer.nvidia.com/downloads/assets/ace/nv_ace_reference-ue5.6-v2.5.0rc3.zip) [Download Unreal Engine 5.5 Plugin](https://developer.nvidia.com/downloads/assets/ace/nv_ace_reference-ue5.5-v2.5.0rc3.zip) [Download Unreal Engine 5.4 Plugin](https://developer.nvidia.com/downloads/assets/ace/nv_ace_reference-ue5.4-v2.4.0.zip) [Documentation](https://docs.nvidia.com/ace/ace-unreal-plugin/2.5/) [Download Maya ACE Plugin and Documentation](https://github.com/NVIDIA/Maya-ACE) ### Speech Recognition The ASR plugin for Unreal Engine 5 includes a ready-to-use English language model, a sample level, and Blueprint examples for rapid setup. [Download Unreal Engine 5.7 Plugin](https://developer.nvidia.com/downloads/ace/ue-plugins/ace_asr_v5_7_1.0.4.zip) [Download Unreal Engine 5.6 Plugin](https://developer.nvidia.com/downloads/ace/ue-plugins/ace_asr_v5_6_1.0.4.zip) [Download Unreal Engine 5.5 Plugin](https://developer.nvidia.com/downloads/ace/ue-plugins/ace_asr_v5_5_1.0.4.zip) ### Character Intelligence The LLM plugin for Unreal Engine 5 provides local, low-latency text generation and function calling capabilities, optimized for immediate character dialogue and decision-making. [Download Unreal Engine 5.7 Plugin](/downloads/assets/ace/ue-plugins/ACE_LLM_5.7_v0.5.zip) [Download Unreal Engine 5.6 Plugin](/downloads/assets/ace/ue-plugins/ACE_LLM_5.6_v0.5.zip) [Download Unreal Engine 5.5 Plugin](/downloads/assets/ace/ue-plugins/ACE_LLM_5.5_v0.5.zip) ### Text-to-Speech The TTS plugin for Unreal Engine 5 includes high-quality, ready-to-use voices, a sample level, and dedicated plugin content to bring characters to life instantly. [Download Unreal Engine 5.7 Plugin](/downloads/ace/ue-plugins/ace_tts_v5_7_1.0.4.zip) [Download Unreal Engine 5.6 Plugin](/downloads/ace/ue-plugins/ace_tts_v5_6_1.0.4.zip) [Download Unreal Engine 5.5 Plugin](/downloads/ace/ue-plugins/ace_tts_v5_5_1.0.4.zip) * * * ## Building Advanced Agents in Custom Engines The Game Agent SDK (Beta) is a lightweight, C/C++ agentic framework designed for seamless, native in-game integration. Its Agent, Chat and RAG APIs help developers connect NPCs to game state, contextual knowledge and model-driven actions. [Download NVIDIA ACE Game Agent SDK](https://github.com/NVIDIA/game-agent-sdk) [Download NVIDIA ACE Game Agent Source](/downloads/ace/game-agent-sdk-v0.5.0-source.zip) ![NVIDIA ACE Game Agendt SDK diagram](https://developer.download.nvidia.com/images/gamedev/game-agent-sdk-diagram-1920x1080.png) * * * ## Run Game Agents On Device The In-Game Inferencing SDK offers a streamlined and high-performance path to integrate locally run AI models into games and applications via in-process (C++) execution and CUDA® in Graphics. [Download NVIDIA ACE In-Game Inferencing SDK](/rtx/in-game-inferencing) [Documentation](https://github.com/NVIDIA-RTX/NVIGI-Core) [Archive](https://developer.nvidia.com/rtx/in-game-inferencing#section-archive) ![NVIDIA In-Game Inferencing SDK stack diagram](https://developer.download.nvidia.com/images/rtx/NvIGI-SDK-diagram.png) In order to leverage the AI models and plugins below, please download [NVIDIA In Game Inference SDK](https://developer.nvidia.com/rtx/in-game-inferencing). See a full list of [NVIDIA ACE compatible models](https://forums.developer.nvidia.com/t/ace-compatibility-table/334024). * * * ## AI Models Intelligence Speech Animation ### NVIDIA Nemotron ASR Fast and accurate automatic speech recognition (ASR), now lighter on memory and supporting up to 25 languages. Choose from a lightweight 140M parameter model, two 600M versions that offer a balance between accuracy and VRAM footprint, or an ultra-low-latency 600M streaming model. Fully compatible with multi-vendor GPUs and CPUs. [Access Model Cards](https://huggingface.co/nvidia/nemotron-3.5-asr-streaming-0.6b) [Download On-Device Model](https://developer.nvidia.com/downloads/ace/speech-model/nemotron-asr-igi-v1.zip) [Access Cloud Model](https://build.nvidia.com/nvidia/nemotron-asr-streaming/deploy) [Documentation](https://docs.nvidia.com/ace-for-games/nemotron-asr/1.0/) ### Chatterbox TTS [Resemble AI](http://Resemble.ai)’s family of TTS models includes a 350M open-source version featuring paralinguistic tagging and zero-shot voice cloning, as well as a 500M open-source version with multilingual support. These models deliver expressive voices with precise emotional and non-verbal control and are compatible with multi-vendor GPUs and CPUs. [Access Model Card](https://huggingface.co/ResembleAI/chatterbox-turbo) [Download On-Device Models](https://developer.nvidia.com/downloads/ace/speech-model/chatterbox_multilingual.zip) [Documentation](https://huggingface.co/ResembleAI/chatterbox-turbo) ### Qwen 3 TTS Alibaba TTS offers stable, expressive, and streaming speech generation with flexible voice design and voice cloning. Its 350M open-source model brings zero-shot voice cloning and paralinguistic tagging to 10 supported languages, with full compatibility across multi-vendor GPUs. [Access Model Card](https://huggingface.co/Qwen/Qwen3-TTS-12Hz-0.6B-Base) [Download On-Device Models](https://developer.nvidia.com/downloads/ace/speech-model/nvigi_qwen3_tts_2_0_0-rc1.zip) [Documentation](https://docs.nvidia.com/ace-for-games/qwen-tts/1.0/) ### NVIDIA Nemotron Open source small language models for game agent capabilities, with strong instruction following and minimal VRAM footprint. It's compatible with multi-vendor GPUs and CPUs. [Access Model Card (9B)](https://developer.nvidia.com/downloads/assets/ace/model_card/nemotron-nano-9b-v2.pdf) [Access Model Card (4B)](https://developer.nvidia.com/downloads/assets/ace/model_card/nemotron_3_nano_4b.pdf) [Download On-Device 9B Model](https://developer.nvidia.com/downloads/assets/ace/model_zip/nvidia_nvidia-nemotron-nano-9b-v2-q4_k_m.gguf.zip) [Download On-Device 4B Model](https://developer.nvidia.com/downloads/assets/ace/intelligence/nemotron_4b_igi.zip) [Documentation](https://huggingface.co/nvidia/NVIDIA-Nemotron-Nano-9B-v2) ### Qwen3.5 Open source, native multimodal, with reasoning capabilities optimized for on-device inference. Qwen3.5 is designed for complex agentic workflows with multilingual support. It's compatible with multi-vendor GPUs and CPUs. [Access Model Card](https://huggingface.co/Qwen/Qwen3.5-4B) [Download On-Device 4B Model](https://developer.nvidia.com/downloads/assets/ace/model_zip/qwen3-4b-q4_k_m.gguf.zip) [Documentation](https://huggingface.co/Qwen/Qwen3-8B) ### Audio2Face-3D SDK Use AI to convert streaming audio to facial blendshapes for real-time lip-syncing and facial animations on-device or in the cloud. The SDK contains C++ and Python source code under the MIT license. [Download Audio2Face-3D SDK](https://github.com/NVIDIA/Audio2Face-3D-SDK) [Documentation](https://github.com/NVIDIA/Audio2Face-3D-SDK/tree/main/docs) ### Audio2Face-3D Models Audio2Face-3D regression (2.3) and diffusion (3.0) to generate lip-sync. Open weights in ONNX-TRT format are available through the NVIDIA Open Model License. Unreal Engine models require the use of the ACE Unreal Engine Plugin. [Download Audio2Face 3.0 Unreal Engine Models](https://developer.nvidia.com/downloads/assets/ace/ace_3.0_a2f_models.zip) [Download Audio2Face 2.3 Unreal Engine Models](https://developer.nvidia.com/downloads/assets/ace/ace_2.5_v2.3_a2f_models.zip) [Download Audio2Face-3D 3.0 Open Source Models](https://huggingface.co/collections/nvidia/audio2face-3d-6865d22d6daec4ac85887b17) ### Audio2Emotion-3D Models Audio2Emotion production (2.2) and experimental (3.0) models to infer emotional state from audio. Open weights in ONNX-TRT format available through a custom license. [Download Audio2Emotion 3.0 Models](https://huggingface.co/nvidia/Audio2Emotion-v3.0) [Download Audio2Emotion 2.2 Models](https://huggingface.co/nvidia/Audio2Emotion-v2.2) ### Audio2Face-3D Training The Audio2Face-3D training framework allows developers to create Audio2Face-3D models using their data. Source code is available in Python under the Apache license. Leverage audio files, blendshape data, animated geometry caches, geometry files, and transform files to get started with the training framework. The sample data is available through a custom license for evaluation only. [Download Training Framework](https://github.com/NVIDIA/Audio2Face-3D-training-framework) [Download Training Sample Data](https://huggingface.co/datasets/nvidia/Audio2Face-3D-Dataset-v1.0.0-claire) * * * ## Models Archive Access previous NVIDIA ACE for Games models. [See Models](https://forums.developer.nvidia.com/t/nvidia-ace-model-archive/362682) * * * ## More Resources ![A decorative image representing Developer Community](https://developer.download.nvidia.com/icons/m48-people-group.svg) ### Developer Discord ![img-alt-text](https://developer.download.nvidia.com/icons/m48-email-settings.svg) ### Sign up for Developer Newsletter * * * ## Ethical AI NVIDIA believes Trustworthy AI is a shared responsibility, and we have established policies and practices to enable development for a wide array of AI applications. When downloaded or used in accordance with our terms of service, developers should work with their supporting model team to ensure the model meets the requirements of the relevant industry and use case and addresses unforeseen product misuse. For more detailed information on ethical considerations for this model, please see the Model Card++ Explainability, Bias, Safety & Security, and Privacy Subcards. Please report security vulnerabilities or NVIDIA AI Concerns [here](https://www.nvidia.com/en-us/support/submit-security-vulnerability/). Ready to try NVIDIA ACE? [Get Started](#section-getting-started "Get Started")