Imperishable Night

Touhou Eiyashou ~ Imperishable Night. (Japanese: 東方永夜抄 〜 Imperishable Night.; lit. "Eternal Night Vignette") is a 2004 vertical bullet hell scrolling shoot 'em up video game developed by Team Shanghai Alice. It is the eighth game in the Touhou Project series, and the third main Touhou Project game to be released specifically for the Windows operating system. Imperishable Night introduces the 'partner' system, allowing the player a choice between four teams of two characters to switch between, each with their own shot type, in real-time. The game's story is based on that of the Tale of the Bamboo Cutter and centers around Gensokyo's moon being replaced by a fake during the Harvest Moon Festival, with the chosen team warping time to try to find the culprit before the end of the night and festival. It was first released at the 66th Comiket on August 15, 2004.