Mastering Fighting Game Using Deep Reinforcement Learning With Self-play
Daewook Kim, Sungyun Park, Seong-Il Yang · 2020 IEEE Conference on Games (CoG) · 2020
One-on-one fighting game has played a role as a bridge between board game and real-time simulation game in terms of research on game AI because it needs middle-level computation power with medium-size complexity. In this paper, we propose a method to create fighting game AI agent using deep reinforcement learning with self-play and Monte Carlo Tree Search (MCTS). We also analyze various reinforcement learning configuration such as changes on state vector, reward shaping, and opponent compositions with novel performance metric. Agent trained by the proposed method was evaluated against other AIs. The evaluation result shows that mixing MCTS and self-play in a 1:3 ratio makes it possible to overwhelm other AIs in the game with 94.4% win rate. The fully-trained agent understands the game mechanism so that it waits until being close to enemy and performs actions at the optimal timing.