Hollow Signal Games

Short, narrative psychological horror experience. Explore the Red Hollow Sanatorium and piece together the fragments Elina left behind.

In Silent Walls: Subject 13

Discover the story of the Red Hollow Sanatorium and the secrets hidden within.

Documents, discoveries and fear: the story assembles as you explore.

Hollow Signal Games is an independent studio based in France. In Silent Walls: Subject 13 is a tense dive into psychological horror.

Press inquiries, review keys, localization, partnerships.

Enter the code whispered in the walls…

Tip: listen to the silence.