Subway Zero: A System Apocalypse

Chapter 2: There's More Than One Rule

1

**【09:03】**

The train hurtled through the tunnel.

Around Liam Cross, the carriage had split into layers.

The outermost layer was pure chaos—people shouting, crying, slamming on the doors, calling out for someone who wasn't there. Someone was trying to force the emergency intercom, but the panel was dead. Someone pulled the emergency brake—nothing happened. Someone smashed their phone against the seat, as if breaking the screen would break the spell.

The middle layer was stunned silence—people staring at their phones, then at the tunnel outside, then at their phones again, unable to process what was happening. A woman in a white shirt was crying silently, tears streaming down her face without a sound. The guy in the hoodie was standing by the door, phone in hand, showing the screen to everyone who passed by, still in disbelief.

And the deepest layer—a thin, faint atmosphere of people beginning to think.

Liam Cross was in that layer.

He stood near the door, planted his feet, and opened the dungeon interface on his phone.

Not to read the rules again. To look at them a second time—because the first time through, he'd missed something.

**【Core Rule 1: This train will never stop...】**

**【Core Rule 2: Late arrivals will be punished...】**

**【Core Rule 3: Survival points system...】**

**【Core Rule 4: Content may be added...】**

Four rules.

But wait—wasn't there a line under Rule 1? He scrolled down.

**【—Exception: The train will stop when all on-time participants have disembarked.**】

He'd seen it before, but he hadn't really registered it.

"Exception."

That word. He'd stared at it for five seconds, something slowly taking shape in his mind.

Rules had exceptions. Exceptions were also rules. Which meant—

The rules had loopholes.

He lifted his head. Scanned the people around him. Nobody else was looking at their phone like he was—reading the rules over and over. They were all still in the outer layer, stuck in panic.

Good.

He looked back down at the phone.

**【Exception: The train will stop when all on-time participants have disembarked.】**

So the train stops. But only when all people who logged in on time get off. That meant—

Liam's gaze swept down to Rule 2 again. Late arrivals would bear the delay costs for on-time participants. If late arrivals bore the costs, then by extension, on-time participants could get off. And if the on-time participants got off, the train stopped.

The logic line suddenly snapped into place in his brain:

**On-time participants get off → the train stops → everyone gets off.**

But Rule 2 said late arrivals would bear the costs. So if on-time participants wanted to get off, they had to make the late arrivals pay.

The question was: how?

## 2

His train of thought was cut off by sudden screams from the far end of the carriage.

Not the "oh my god what's happening" kind of scream.

The "something is actually happening" kind.

Liam Cross turned his head. Near the door of the next carriage, through the connecting**, he could see people scrambling backward—pushing, shoving, someone fell, someone climbed over the person who fell, everyone was retreating as if something terrifying had appeared at the front.

Something. Not someone.

**"There's a person—"**

A girl ran backward into this carriage. Her face was ashen.

**"There's a person at the front of the carriage—he's—he's dead—"**

The surrounding noise cut out like someone had flipped a switch.

For two full seconds, the entire carriage was completely silent.

Then the crying and screaming exploded louder than before.

## 3

Liam Cross didn't move.

He stood in place, watching the crowd surge and recede. Someone was crying. Someone was vomiting. Someone was trying to pry open the doors with a fire extinguisher. Someone was already trying to smash the window with the emergency hammer. But the window held—not a single c***k.

The guy in the hoodie pushed through the crowd and ran over to Liam Cross.

**"Did you hear that? Someone died!"**

**"I heard."**

**"And you're just standing here?!"**

Liam Cross looked at him.

**"What do you want me to do?"**

The guy was momentarily speechless. His eyes darted, sweat beading on his forehead. **"I... I don't know. But we can't just—"**

**"Go see."**

**"What?"**

**"If someone really died at the front of the carriage, going to see is better than standing here screaming. At least you'll know what happened."**

Liam Cross turned, pushed through the crowd, and walked toward the end of the carriage.

The guy in the hoodie stared at his back for a second, then caught up.

## 4

They crossed through two carriages.

Every carriage was the same—chaos, panic, someone crying, someone shouting, someone sitting blankly on the ground. People crowded the doors, talking at once, asking pointless questions that none of them could answer.

By the time they reached the end of the train, the crowd had thinned.

The last carriage was almost empty.

Almost.

There were about seven or eight people at the far front—standing in a loose semicircle, keeping a cautious distance from something on the ground.

Liam Cross walked over and saw it.

A man in a gray suit. Lying face-down on the floor of the carriage. His phone was still lit, screen facing up, displaying the dungeon interface. A thin trickle of blood had seeped from beneath his head, threading along the gaps between the metal floor panels.

Nobody dared to get close.

A woman nearby was whispering: **"He just... suddenly fell. His phone screen was glowing, and then he grabbed his head and fell. Just like that."**

Liam Cross crouched down, about two meters away. Looked at the phone on the ground. The screen was still on. Rule interface. And a line of red text— **【Participant eliminated. Cause: Rule violation. Specific content: Rejected.】**

**"Rejected..."** Liam Cross muttered under his breath.

The guy next to him asked, trembling: **"What is it? What does it say?"**

Liam Cross stood up. **"He broke the rules."**

**"Broke the rules? Which rule? There are only four rules—"**

Liam Cross showed him the screen. On the dead man's phone, below the red elimination notice, was a line of supplementary text Liam Cross was seeing for the first time—a hidden rule that appeared only after someone violated it.

**【—Hidden Rule 1: On-time participants are prohibited from sharing dungeon information with late arrivals before the first stop. Violation constitutes rule-breaking. Currently violated by 1 person.**】

The guy's face turned white.

**"Hidden rules... are there hidden rules too?"**

Liam Cross didn't answer. He stared at that line, his mind racing even faster. A hidden rule that only appeared after someone triggered it. This meant the system had more rules than it showed. And the only way to figure out the rules—was to watch someone die.

He memorized that hidden rule silently, then turned and walked back toward his own carriage.

Behind him, the guy in the hoodie was still standing frozen, staring at the dead man's phone screen, unable to move.

(End of Chapter 2)