Touhou Gouyoku Ibun: Sunken Fossil World (2021)

Touhou Gouyoku Ibun: Sunken Fossil World is the 17.5th installment of the Touhou Project, created by Team Shanghai Alice, with Twilight Frontier's collaboration. The game is described as a "horizontal side-scrolling danmaku water action game" on the official website.

• Release Date: October 24, 2021
• Developer: SUNFISH Co., Ltd.