Cheat Line : Checkpoint

The world didn’t fall because of war.

It collapsed because of betrayal.

A mysterious technology appeared without warning — a mobile application called Cheat Line. No one knows who made it. No company claimed it. Yet within weeks it spread across the world.

The app does something impossible.

When opened, Cheat Line activates the phone’s camera and sensors, scanning the behavior and biometric signals of the person in front of it. Using unknown technology, it analyzes body language, emotional responses, and behavioral patterns.

Then it reveals the truth.

With 99% accuracy, the app can detect if someone has cheated on their partner.

When a cheating partner is detected, a faint red glow line appears above their head on the phone screen, visible through the camera — a digital mark of betrayal. 

The app can even estimate how many people the partner has cheated with.

At first it was just curiosity.

Then people started testing it on their partners.

And the truth began to destroy everything.

Relationships shattered overnight. Trust disappeared. Rage replaced love.

Partners discovered betrayals they never suspected. Arguments turned into violence. Violence turned into revenge.

Soon the entire town was consumed by chaos.

Lovers hunted each other in the streets. Homes burned. Families collapsed. In their fury, people destroyed their own city until nothing remained but ruins.

Now the town is an abandoned wasteland.

Some survivors are wounded.
Many are dead.
And the rest are running.

But far away, one place still survives.

A last remaining city, untouched by the madness.

The survivors from the ruined town are now trying to enter this city to escape their past. Some are innocent victims of the chaos.

But many of them are killers who murdered their partners after discovering the truth through the Cheat Line app.Some survivors carry visible wounds on their bodies, while others appear unharmed.

If even one dangerous person enters the city, the same violence could destroy the last safe place on Earth.

Your Role

You play as a security officer guarding the final checkpoint outside the last surviving city.

Every survivor must pass through your checkpoint.

They will talk to you.
They will lie.

Some will appear innocent.

Others will try to hide the truth.

Many will attempt to trick you.

Using investigation tools, interrogation, and the Cheat Line detection technology, you must uncover what really happened in the destroyed town.

Your Duty

• Scan suspects using the Cheat Line detection system
• Analyze suspicious behavior and body language
• Detect lies and hidden crimes
• Decide who is innocent and who is dangerous

Your decisions determine their place.

• Allow the innocent to enter the city
• Send criminals to jail
• Eliminate dangerous killers before they enter

But be careful.

Some of the most dangerous people are also the most convincing liars.

One mistake could let a killer inside the city.

And if that happens…

the last safe city may fall just like the one before it.

Your Ultimate Mission

The chaos will never truly end as long as the Cheat Line app exists.

As the security officer, you will uncover clues about the mysterious network that powers the app.

Your ultimate objective is to locate and destroy the hidden Cheat Line service infrastructure — the system that keeps the app running.

If you succeed:

The red detection marks will disappear.
The cheating detection system will shut down.
And the cycle of betrayal and violence may finally end.

Key Features

• Unique checkpoint investigation gameplay
• Futuristic Cheat Line detection technology
• Psychological interrogation mechanics
• NPCs that lie, manipulate, and deceive
• Dark abandoned world atmosphere
• Player decisions shape the fate of the city

The Last Line of Defense

You are not just a guard.

You are the final barrier between truth and chaos.

The city is watching.

The survivors are waiting.

And every choice you make will decide…

who deserves a second chance — and who must never enter the city again.