This single-player bullet-hell shooter sets its mystery in Gensokyo, where an unusual full moon rises during the Lunar Capital Exhibition. The night sky pauses, unfamiliar youkai appear, and the festival draws them in as a larger conspiracy unfolds. Fujiwara no Mokou joins the conflict when the disturbance escalates and even she and Keine struggle to cope, grounding the shooting action in a supernatural crisis.
The game’s central appeal is danmaku, presented with a distinctive, glamorous visual style and fiercer, more intense bullets. Enhanced art effects are intended to bring greater detail, while music accompanies new storyline performances. Beginner guides and adjustable difficulty provide ways into the shooting for newcomers; the description also mentions new difficulties and systems without spelling out their rules. Together, these elements frame the game as both a story-led adventure and a bullet-hell challenge, with its presentation central to the experience.
Listed as single-player, Fantastic Danmaku Festival Part III is designed for solo play rather than multiplayer sessions.