Hyunseung Kim

I am an AI Researcher at KRAFTON AI, mentored by Kangwook Lee. I'm building embodied agents that can reason, adapt, and act autonomously in complex, real-time environments. Also, I am a Ph.D. candidate at KAIST, advised by Jaegul Choo.

Email / CV / Google Scholar / Linkedin / Github

News

10.2026. Two PUBG Ally papers are accepted to the NeurIPS 2026 BiALIGN Workshop, one as an oral presentation!
09.2026. The PUBG Ally tech report is out on arXiv!
09.2026. PHUMA is accepted to CoRL 2026 as a spotlight presentation!
06.2026. PUBG Ally is released to the public as a beta service!
06.2026. 3D HAMSTER is accepted to IROS 2026!
02.2025. - Present. AI Companion Team Lead at KRAFTON AI.
01.2025. SimBa is accepted to ICLR 2025 as a spotlight presentation!
09.2024. DoDont is accepted to NeurIPS 2024!
08.2024. - 02.2025. AI Research Internship at KRAFTON AI.
05.2024. Two papers, Hare&Tortoise and CoIn are accepted to ICML 2024!
09.2023. Two papers, DISCO-DANCE and PLASTIC are accepted to NeurIPS 2023!

Experience

KRAFTON AI Aug. 2024 - Present

AI Researcher · AI Companion Team Lead

PUBG Ally Project Project Lead

PUBG Ally is the world's first in-game AI agent that can reason, act autonomously, and play alongside players as a voice-enabled teammate in a live battle royale game.
Led the project end to end to reach live service: agent architecture, data collection, training, evaluation, and on-device optimization.

tech report / post / video / many more

Talks

AI Tech Day 2026, Korea University, Seoul Oct. 2026

Toward Fully Autonomous Embodied Agents

Game Science Forum 2026, Seoul Sept. 2026

AI That Plays Games With You: From Play to Learning

CDEC 2026, Shanghai July 2026

From NPCs to Teammates: Building the Next Generation of Game AI

Sony AI, Game AI Reading Group (online) June 2026

PUBG Ally: Building a Co-Playable AI Teammate in PUBG

GDC 2026, San Francisco Mar. 2026

Building a Co-Playable Character: PUBG Ally, an AI Teammate Powered by NVIDIA ACE / video
with Evgeny Makarov (NVIDIA)

SNU-CMU HCAI Research Center, Seoul Oct. 2025

Building Co-Playable Characters in Games

Publications

PUBG Ally: A Conversational Embodied Agent as an AI Teammate
PUBG Ally Team
Project leads: Kangwook Lee, Hyunseung Kim.
Tech Report'26.
paper / video

When Agent Responses Become Interaction State: Safety in a Deployed AI Teammate
Sue Hyun Park, Minkyoung Park, Byeongju Kim, Seohyeon Jung, Youngin Cho, Jimin Hong, Hyunseung Kim
NeurIPS'26 BiALIGN Workshop (Oral).

Aligning Embodied Companion Agent Evaluation with User Experience
Seohyeon Jung*, Sue Hyun Park*, Byeongju Kim*, Jimin Hong, Youngin Cho, Jaewoong Cho†, Hyunseung Kim†
*Equal contribution, †Equal advising.
NeurIPS'26 BiALIGN Workshop.

3D HAMSTER: Bridging Planning and Control in Hierarchical Vision Language Action Models through 3D Trajectory Guidance
Dongyoon Hwang*, Byungkun Lee*, Dongjin Kim*, Hyojin Jang, Hoiyeong Jin, Jueun Mun, Minho Park, Hojoon Lee, Hyunseung Kim, Jaegul Choo
IROS'26.
project page / paper / code

PHUMA: Physically Reliable Humanoid Locomotion Dataset
Kyungmin Lee†, Sibeen Kim†, Youngdo Lee, Minho Park, Hyunseung Kim, Dongyoon Hwang, Donghu Kim, Hojoon Lee, Jaegul Choo
CoRL'26 (Spotlight).
project page / paper

SimBa: Simplicity Bias for Scaling Up Parameters in Deep Reinforcement Learning
Hojoon Lee*, Dongyoon Hwang*, Donghu Kim, Hyunseung Kim, Jun Jet Tai, Kaushik Subramanian, Peter R. Wurman, Jaegul Choo, Peter Stone, Takuma Seno.
ICLR'25 (Spotlight).
project page / paper

Do’s and Don’ts: Learning Desirable Skills with Instruction Videos
Hyunseung Kim, Byungkun Lee, Hojoon Lee, Dongyoon Hwang, Donghu Kim, Jaegul Choo
NeurIPS'24.
project page / paper

Slow and Steady Wins the Race: Maintaining Plasticity with Hare and Tortoise Networks
Hojoon Lee, Hyeonseo Cho, Hyunseung Kim, Donghu Kim, Dugki Min, Jaegul Choo, Clare Lyle
ICML'24.
paper / code

A Simple Convolution INjector for Vision Transformer: Towards Effective Adaptation in Visuo-Motor Control
Dongyoon Hwang*, Byungkun Lee*, Hojoon Lee, Hyunseung Kim, Jaegul Choo
ICML'24.
paper

DISCO-DANCE: Learning to Discover Skills through Guidance
Hyunseung Kim*, Byungkun Lee*, Hojoon Lee, Dongyoon Hwang, Sejik Park, Kyushik Min, Jaegul Choo
NeurIPS'23.
project page / paper / code / poster

PLASTIC: Improving Input and Label Plasticity for Sample Efficient Reinforcement Learning
Hojoon Lee*, Hanseul Cho*, Hyunseung Kim*, Daehoon Gwak, Joonkee Kim, Jaegul Choo, SeYoung Yun, Chulhee Yun
NeurIPS'23.
paper / code / slide / poster

DraftRec: Personalized Draft Recommendation for Winning in MOBA Games
Hojoon Lee*, Dongyoon Hwang*, Hyunseung Kim, Byungkun Lee, Jaegul Choo
WWW'22.
paper / code / poster

Other activities

Reviewing activities

Neural Information Processing Systems (NeurIPS)'23-25
International Conference on Machine Learning (ICML)'24-25
International Conference on Learning Representation (ICLR)'24-25

Awards

3rd Place in Computer Science & Engineering, Samsung Humantech Paper, 2025.
2nd Place, Korea University Graduation Project, 2020, 2021.

Template based on Hojoon's website.