This is a city invaded and destroyed by zombies.
The fact that you live in this city means that you will soon be infected by the zombie virus.
Zombies have entered your mansion and are after you.

You need to get a gun in a mansion and kill zombies.
Also, you have to get food for a long fight.

Among zombies, your family or close friends will become zombies and attack you without recognizing you.
Showing hesitation or being kind to the zombies is like your death.
You have to shoot the zombies without hesitation.

[How to play the game]
Find and kill zombies in the mansion with guns.
It takes time to reload once you're done with the bullets.
Run away from the zombies while they are reloaded, and shoot them again when they are reloaded.
Find a box hidden in a mansion and get food or first aid kit.
Also, collect coins and exchange them for various guns or first aid boxes at the store in the first room of the mansion.
A key is required to clear that floor and move to the next floor.
Kill all zombies, find the key and move to the next floor.

Find your mansion full of zombies again, and survive in the end-of-life world full of zombies.
Can you survive zombies?

Arm yourself now, and kill the zombies.