The gameplay revolves around using the player's abilities as a Devil Forgemaster to forge familiars that fight alongside them. The player can level up and morph into different stages depending on the weapon used. Character attributes and experience points also play a role in the game, allowing players to craft their own weapons and upgrade their equipment.
Combat is based on a lock-on system, where players can hit enemies with multiple combos and control their Innocent Devil to use skills, guard, or join the fight.