Tunnel Warfare (Di Dao Zhan) is an unlicensed action game by Waixing Technology based on the classic Chinese film of the same name. Set during the anti-Japanese war in 1942, players lead a local militia through a network of tunnels to outmaneuver invaders. The game features maze exploration, tactical combat using tunnel traps, and boss battles at enemy outposts. It is a unique historical action game that holds significant cultural value in the Chinese retro scene.