Ikusa Megami Zero is a prequel to the first Ikusa Megami game: it follows the events that made Celica, a noble warrior and a paladin of the god Barouhart, to become known as the “God-Killer”. Still as a young man, Celica receives an assignment to purify a sacred object in the temple. But an unexpected meeting changes his fate, forcing him to choose between love and loyalty.
Like its predecessors, Ikusa Megami Zero is a traditional Japanese RPG with a party, turn-based battles and “retro” 2D graphics. The battles are viewed from an isometric perspective. Also like its predecessors, the game contains explicit sexual scenes. Cut scenes appear as still anime-style images.