Author's Note: I'm reworking this and the other chapters I published.
While having a cardboard box and duck tape around him, equipped with a kitchen knife. He is set off to go and start making a base or a least a safe home for himself.
Ignoring the bodies on the ground Josh is checking every door to make sure that, that floor is safe. He finds a little bit of food but eats it all because of not eating the whole entire day.
When he about to finish checking the floor he finds 20 Zombies in one apartment, after seeing the zombies he quickly hide so he won't be detected by the meat eating monsters, lucky the system told him that "They were all level 1 Zombies",
he was still cautious about what he does.
As a saying goes he heard form a random stranger, while buying something" A product is either a lot of it but low quality or little of it but high quality".
After making sure that if attacks first he get advantage, he decided to attack, killing the zombie in one slice, slitting the zombie throat,
after that he realizes that the zombie are much easier because of thier lower level compared to leveled 5 zombie, and due to the fact that he had upgraded his strength a lot a little while back.
Still surprised by the fact he can kill the zombies so easily he finishes the 20 zombies in under a minute.
[You Killed A Level 1 Zombie]
[You Killed A Level 1 Zombie]
[You Killed A Level 1 Zombie]
[....]
[You gained +10(+20) experience]
[You gained +10(+20)experience]
[You gained +10(+20)experience]
[...]
After the series of notifications he wondered why he did level up, So he asked the system "hey system why didn't I level up".
[You Haven't Met The Requirements To Level Up]
Josh then said what percentage am I at.
[You Are At 14.8%(740/5000 To Level Up]
Josh asked why.
[The Zombie You Killed Aren't High Enough Level To Level You Up]
Josh then asked what are the requirements to level up for each level
[When level 0, You'll Need 10 Experience. In Level 2 You'll Need 50 Experience. In Level 3 You'll Need 100 Experience, And So On, For Level 5 You'll Need 5000 Experience.]
Josh was surprised because the requirements to level up for each level. After that Josh then checked the last rooms, but found no more zombies. Luckily he found more food and water.
So after clearing floor 9th he decided to go to the last floor, which is the 10th floor to reach the rooftop, to see what's happening out in the world.
So he went to the 10th floor, he checked every room for monsters, but for some reason he found no monsters and the whole floor was clear, including the rooftop.
While on the rooftop he saw the world in disaster happening, apart from that he found nothing unusual.
So he went down to the 8th floor, and checked the rooms there too. Half way done he found a huge buff zombie eating a corpse.
Josh then asked the system what level is it.
[It Is Level 15, Be Carful The Level Difference Is To High, Your Chances Of Surviving Is A Low of 10%]
After heading that Josh decided to go back to the 9th floor, to avoid the buff zombie.