Soon, people will be able to play Mountain of Faith (10), Subterranean Animism (11), and Undefined Fantastic Object (12).
Touhou: Mountain of Faith, Subterranean Animism, and Undefined Fantastic Object will all be released on PC via Steam on June 6, 2020.
Touhou: Mountain of Faith was originally released in 2007, and it is something of a soft Touhou game series reboot that stars only Reimu and Marisa as playable characters.
Two other Touhou games, Double Spoiler and Fairy Wars, were released onto Steam in July 2019.