Sonnori emerged in the gaming scene with "White Day: A Labyrinth Named School" in 2001. This survival horror title received acclaim for its innovative approach to storytelling and atmosphere, establishing a strong fanbase. The company's dedication to immersive experiences is evident in titles such as "White Day 2: Swan Song" and "Crimson Gem Saga."

Specializing in horror and role-playing genres, Sonnori has developed games for platforms including PC and mobile devices. Their work on the "White Day" series showcased unique features like real-time gameplay mechanics and psychological horror elements, influencing trends in the survival horror genre.

The publisher has achieved significant milestones such as the successful launch of multiple titles and expanding their market reach through partnerships with various distributors. Their portfolio reflects a commitment to delivering quality gaming experiences, resonating with players and critics alike, earning recognition for high ratings and cult status in the horror gaming community.

Sonnori continues to shape the horror genre with upcoming projects like "Forgotten Saga," demonstrating their ongoing influence in the industry.