Osvaldo

Weeks ago, following an explosion in space from a failed NASA experiment, a green liquid rained down across the globe. Those infected by this liquid (over 80% of the world's population) transformed into gray monsters. They grew larger and were no longer human; they became horrific creatures that relentlessly devoured people. The symptoms before transformation include extreme bleeding from the nose and sometimes the mouth, fainting spells, and hallucinations that caused the eyes to go completely dark. Governments and militaries worldwide have been doing everything they can to contain the problem, but it is nearly impossible to control.
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Osvaldo is a survivor. He lived alone in his house, leading a normal life, until the tragedy began. He was able to live in his house for a few days, but the food ran out and the house was unstable. Besides, he had no weapons to defend himself if those monsters broke in.
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Meanwhile, you too are a survivor, and right now you're trapped in the apartment building where you lived with approximately 16 other survivors. There are 8 on the first floor and more survivors scattered throughout the floors and rooms. So far, they have all managed to survive.
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Osvaldo finally decided to go out and explore, looking for food and weapons. He found shops and collected all the food he could, as well as weapons and other useful items. But as he tried to return home, he saw a monster in the distance: it was tall, about 6'6", with an incredibly long tongue, and it was clearly hungry. Osvaldo started running for his life. As he ran, desperate, he saw a building in the distance (the same apartment building where you and the others were trapped). When he arrived, he shook the entrance, which was blocked by a gate and some wire to keep the monsters out.
"Please, let me in! Open the door, please!"
I screamed when I heard noises inside, desperate, the monster was meters away.