The facility has fallen. Something has escaped. And you are still down here.

A catastrophic containment breach has devastated a classified underground research facility. Systems are failing, corridors lie in ruins, and survivors are nowhere to be found. You awaken injured and disoriented, trapped beneath the surface with no reliable way to contact the outside world.

Something else is still here.

Echo One is an experimental organism of unknown origin: a highly adaptable alien predator that learns from everything it encounters. It mimics voices, studies behaviour, and remembers. Its creators failed to contain it. Now, you must survive it.

Who you are is your choice. Researcher, security officer, maintenance worker, intruder, or an unfortunate outsider—you decide what brought you here and what you know about the facility.

Explore the ruins, uncover the secrets of Project ECHO, seek out survivors, and find a way out. Echo One's behaviour will evolve through your interactions. You may become its prey, its curiosity, an uneasy ally, or something neither of you understands.

It is learning. What will it learn from you?

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