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Saturday night. A solitary weekend following your first paycheck.

10 PM, the doorbell rings. There is no one on the intercom.

12 AM, a sound comes from the front door.

"Password does not match."

■ An Ordinary Evening Becomes a Condition for Survival

Whether you put on your headset, charged your phone, engaged the auxiliary latch, or left the lights on.

Every action taken during an evening spent seemingly idly becomes the reason for your life or death after midnight.

■ A Different Intruder Every Time

Burglars, that man on his way home from work, former tenants, deliverymen, the man next door...

And the "Smiling Man," who knows exactly where you are hiding from the start and waits on purpose.

You must figure out who has arrived by the sound of footsteps and habits.

■ Staying in One Place Gets You Discovered

He ransacks the entire house. The only way to survive is to move to a spot he has already opened, while he turns his back.

Hold your breath, peek through the crack in the door, and lure him with speakers and the TV.

Don't be fooled by the sound of footsteps pretending to leave.

■ A Different Game Every Time

You won't know what game you'll be playing tonight until you start.

Read-only choices, floor plans showing the entire house, or first-person 3D walking around.

The clues visible differ depending on the format, and those clues lead to a single truth.

■ 17 Endings

Will you hold out until the police arrive, or break through the lightweight partition on the veranda to escape?

And the final ending, which can only be seen after passing through several nights.

"I never rang the doorbell."

※ Contains horror and tension-inducing direction, as well as scenes that startle you.

※ Using earphones is recommended.