Q&A: How KRAFTON Built PUBG Ally, a Co-Playable Character Powered by NVIDIA ACE | NVIDIA Technical Blog

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This post details KRAFTON's implementation of PUBG Ally, a co-playable character powered by NVIDIA ACE. It highlights the technical architecture involving on-device automatic speech recognition, a 2B-parameter small language model (Mistral-NeMo-Minitron-2B), and text-to-speech. Key engineering efforts focused on minimizing latency through on-device deployment, prompt engineering for efficient KV cache usage, and architecting a System 1 (behavior tree) / System 2 (language model) pipeline to handle fast, reactive gameplay separately from deliberate reasoning. Domain adaptation for PUBG-specific terminology and grounding responses in game state were also addressed.