Sengoku Cannon: Sengoku Ace Episode III follows where its predecessor Sengoku Blade ended. Like the previous games in the series, it's a side-scrolling 2D shooter set in a steampunk version of the Sengoku period. Players choose one of six supernatural characters to take on various demons and giant steampunk enemies.
The game features a variety of attacks, including a powerful single shot called "cannon" that players charge up; players can also use a standard rapid-fire attack, and a Dodonpachi -style laser that slows down the player when firing. The gameplay involves navigating through levels while fighting against enemies, with an emphasis on strategy and quick reflexes.
Sengoku Cannon: Sengoku Ace Episode III was released in 2005 for the PSP console.