Shannon emerged in the gaming scene with "アパシー学校であった怖い話1995特別編" in 2017. This horror visual novel received acclaim for its engaging narrative and atmospheric design, establishing Shannon as a notable player in the indie game market. The company's dedication to storytelling and immersive experiences is evident in titles such as "アパシー小学校であった怖い話 月曜日" and "アパシー学校であった怖い話 極."

Specializing in horror and narrative-driven games, Shannon has developed titles for platforms including PC and mobile. Their work on the "アパシー" series showcased unique features such as branching storylines and multiple endings, influencing the visual novel genre and inspiring other indie developers.

The publisher has achieved significant milestones such as the successful launch of multiple titles within the "アパシー" series, expanding their market reach through digital distribution platforms.

Shannon's portfolio reflects a commitment to delivering quality gaming experiences. Their contributions have resonated with players and critics alike, earning recognition for high ratings and a dedicated fanbase.

Shannon continues to shape the horror genre with upcoming projects like "scuff(ed)" and "captain mathematica," demonstrating their ongoing influence in the industry.