They will come

Because of the zombie virus, you are left all alone against a huge horde of monsters. Try to stand up against an endless horde of zombies by upgrading your old weapons or buying more and more powerful weapons.
More and more monsters will come to the shots.
Over time, you will see more and more dangerous and difficult enemies.

Aim at the enemies with the mouse.

The left mouse button is a shot at the enemy.

Throw a grenade - the "G" button on the keyboard.