Touhou Koumakyou ~ Embodiment of Scarlet Devil (東方紅魔郷 ～ Embodiment of Scarlet Devil), henceforth referred without the definite article "the", is a vertical-scrolling danmaku shoot 'em up, and is the sixth official game in the Touhou Project by Team Shanghai Alice's sole member ZUN. It is the first to be released specifically for the Windows operating system and the starting point for the current canon of the Touhou Project, being a "clean break" from the PC-98 era.
Embodiment of Scarlet Devil features two playable characters to choose from, with two Spell Card types each. Reimu Hakurei can cover a wide area of the screen with weaker attacks, while Marisa Kirisame relies on her speed and power to make up for her thinner attack spread. The bombs show different behavior and damage depending on the character and type chosen.
Unlike its predecessor, Mystic Square, Embodiment of Scarlet Devil comes with an "automatic item collection" feature, which allows you to collect all items on the screen by moving to the top of the screen if you are at full power, as well as a counter-bomb system, which allows you to avoid a fatal hit by using a bomb immediately.
Though there are six total stages in the main game, playing on Easy will end the game after Stage 5.
During a peaceful summer in Gensokyo, an unnatural scarlet mist appears without warning and covers much of the land. It is strong enough to block out the sun, causing the affected areas to become dark and cold. Reimu Hakurei, a shrine maiden working at the Hakurei Shrine, and Marisa Kirisame, a magician, set out to find the source of the mist. Their search will lead them to the Scarlet Devil Mansion and to its eccentric owners...