Beneath the Hum is a first-person psychological horror game focused on exploration, environmental storytelling, and building tension. Players must venture deep into ancient underground ruins, solve environmental puzzles using a mysterious archaeological artifact, and uncover the truth behind an ancient ritual, all while an unsettling low hum follows them wherever they go and an unknown presence begins to stalk them.

In the demo, players take on the role of David, an archaeologist who awakens alone in his office late at night, disoriented and haunted by fragmented memories. He soon discovers that Liz, the woman he loves, has fallen into a coma and may not survive. From the moment he wakes, David begins to hear a constant, low hum in his ears—a persistent sound of unknown origin that grows stronger as he gets closer to the truth. Guided by a map, a cassette tape, and an ancient archaeological artifact, he sets out to piece together the events that led to this moment. The clues point to a remote location marked on the map, where he believes he will finally find the answers he is searching for.

David arrives at an isolated desert region. From there, he travels on foot through towering rock formations, navigates narrow passages, and descends into increasingly deeper caves until he uncovers the entrance to a vast network of ancient ruins hidden beneath the earth.

Within the ruins, David discovers the remains of an abandoned archaeological expedition, along with modern tools, supply crates, documents, and deserted campsites. The records speak of a lost civilization, an ancient emperor. As he ventures deeper into the ruins, he begins to realize he is not alone—something seems to be silently watching his every move.

To progress, David must use the ancient artifact to reveal hidden symbols, solve environmental puzzles, and activate mechanisms that have remained sealed for centuries.

As the journey continues, the line between reality and hallucination begins to blur. The mysterious hum grows louder, while an entity connected to the ruins' ancient rituals starts to manifest in unpredictable ways—watching from the darkness, appearing for only a brief instant, or vanishing before David can react. It is never entirely clear whether this presence is real or merely the consequence of something David is unknowingly awakening.