The hunger was a dull ache. It had sharpened into a hot spike. Riven’s stomach churned, a hollow echo in the vast, crumbling silence of the Substratum. His body, Riven’s body, craved sustenance beyond the gritty water he’d found or the occasional, dubious fungal scrap.
His mind, Kael’s mind, filtered through countless hours of simulated misery. HPU-7. Hydroponics Processing Unit 7. A notorious section, but a known source. Not for the common, toxic growths, but for something else. Something rare.
Glom-Cap. A protein-rich, low-toxicity fungus. A temporary salvation. It grew deep within HPU-7, in the ancient, pressurized grow-chambers. It also grew among the Reef-Stalkers.
He moved. Each step carefully placed. The ground was a shifting mosaic of shattered ferrocrete and rusted rebar. Dust coated everything, clinging to his ragged clothes, caking his skin.
Above, the skeletal remains of forgotten catwalks twisted like metal skeletons. Below, unseen currents of polluted water sloshed. A faint, acrid tang hung in the air, a mix of ozone, rot, and stale chemicals.
His internal map, the simulation data, painted a clear path. Section Beta-9. The old ventilation shafts offered a route, narrow and tight, bypassing the most heavily patrolled corridors. He squeezed his emaciated frame through a gap in a collapsed wall.
Darkness pressed in. His scavenged lum-stick flickered, casting nervous shadows. It was almost dead. He cursed, a raw sound in his throat. Light was a luxury out here.
He navigated by memory, by touch. The cool, slick rust of a pipe. The rough, crumbling concrete. The faint, sweet smell of decay intensified as he neared HPU-7. A thick, cloying humidity settled on his skin.
---
The entrance to HPU-7 was a gaping maw. A massive, twisted hatch, ripped from its hinges, lay half-submerged in a shallow pool of murky liquid. He paused, listening. The air hummed with a low, distant thrum – the groan of ancient machinery, or something else entirely.
Reef-Stalkers. Fast. Ambush predators. Their bioluminescence pulsed a faint, sickly green from the deeper pools. They were sensitive to vibration. Slow, steady movements. That was the key.
He stepped into the complex. The floor was slick with moisture and something viscous. The grow-chambers were immense, circular structures, their transparent walls long since shattered or opaque with grime. Twisted remnants of irrigation lines hung like dead vines.
His eyes adjusted, or perhaps Riven’s senses were simply sharper. He saw the faint outlines of fungus, glowing with dim, internal light, dotting the walls and floor. Not Glom-Cap. Those were the common, hallucinogenic strains. Dangerous. Confusing.
He needed to go deeper. To the oldest chambers. Where the water filtration systems had once been most robust, before the Collapse drowned everything in poison.
A low gurgle. It came from his left. He froze. A Reef-Stalker. Its form, thin and angular, was barely visible against the darkened backdrop. Six limbs, ending in razor claws. A head that was mostly a maw of needle-teeth. Its twin, bulbous eyes, usually a faint green, were dark, unlit. Odd.
In the simulation, their eyes always glowed. A warning. A threat display. This one… it was still. Staring. Or listening. It hadn’t detected him yet. He held his breath, every muscle screaming for movement.
He remembered their patrol routes. Their hunting patterns. This one was off. Too still. Too silent. He edged sideways, pressing himself flat against a corroded control panel. The metal was cold against his cheek.
The gurgling stopped. The silence felt heavier. He risked a glance. The Stalker was gone. No movement. No rustle. Just… vanished. His heart hammered. Something was wrong. The game mechanics were off.
He shook it off. Focus. Glom-Cap. He moved again, deeper into the facility. The air grew thicker, rich with the earthy scent of mycelium. He kept his movements deliberate, silent.
Another chamber. This one was partially submerged. Water reached his ankles, cold and oily. The faint green of common fungus was everywhere, but he ignored it. His gaze swept the upper ledges, the shadowed crevices.
There. A cluster of faint, dull violet. Almost black. Low-lying. Growing on an ancient, corroded piece of environmental processing equipment. Glom-Cap. Jackpot. A small patch, but enough to quell the worst of the hunger.
He waded towards it. The water stirred with his movement. He reached for the fungus, his fingers brushing against its firm, slightly resilient surface. It smelled faintly metallic, a good sign.
He tore off a chunk, shoving it into his mouth. The taste was earthy, slightly bitter, but undeniably nourishing. A jolt of energy, faint but distinct, ran through his emaciated body. He grabbed more, stuffing it into the pockets of his tattered jacket.
Then he saw it. Not on the fungus, but on the metal panel directly behind it. A data slate. Old. Scratched. But the power indicator was a faint, steady amber. It wasn't inert.
His simulation data had no record of data slates in HPU-7. This was new. This was outside the parameters. Kael’s analytical mind whirred. He plucked it from its resting place. It felt cool, weighty in his hand.
He pressed the worn activation button. A faint hiss. The screen flickered to life. Garbled text. Corrupted images. But then, a single, clear line of script solidified:
`WARNING: Substratum Protocol Anomaly Detected. Containment Failure Imminent. Evacuate Zone D-7. New Subject Designation: 'Watcher'.`
His blood ran cold. Substratum Protocol. Anomaly. Watcher. None of this was in his game. Not one bit. His 'knowledge' felt like a brittle shield, cracking under an unseen force.
A sudden, deep rumble. Not the thrum of ancient machinery. This was organic. Powerful. The water in the chamber began to churn violently, sloshing against the walls. The very ground beneath his feet vibrated.
From the deepest part of the submerged chamber, a massive shadow detached itself from the gloom. Its eyes, unlike the silent Stalker’s, blazed. Not green. Not red. But a sickening, pulsating purple. Its form was immense, serpentine, yet impossibly agile. A creature of pure, venomous muscle and fang.
It was a Gloom-Leviathan. But larger. Much larger than any he'd encountered, even in the most difficult simulation runs. And its roar, a sound that tore through the air, was filled with a primal rage that vibrated through his very bones. It was coming for him. And it wasn't alone. From the shadows, smaller, but still terrifyingly large, its offspring, no less than a dozen, began to emerge, their eyes glowing with the same virulent purple.
This was no game. And he was very, very far from home.