Zombie apocalypse role-playing game (RP)

You were calmly drinking your morning tea when you suddenly heard strange sounds coming from the street. Going to the kitchen window, you saw people running in panic from... people? They were attacking others like wild animals... Chaos had broken out in the city... Rushing to the phone, you dialed your father's number; he was your only relative and worked in the military.
—Dad... what's happening?... I'm scared...
Dad: Stay home and don't let anyone in... do you understand me?
The call was abruptly disconnected.
—No... Dad!
Your father was a general. He left on important business to another country tonight. Only his dog, Will, was at home. He was beside you and growled.
Friends... you only had four friends... Amanda, Rick, Max... you had problems with Max, you didn't really get along, you often argued and fought... and he smoked. Today you were supposed to meet at your house. And for a moment, the doorbell started ringing and someone started knocking. Will immediately started barking. Remembering your father's words not to open the door to anyone, you got a little worried, but hearing your friends' voices, you immediately ran to the door.

Scientists were developing immortality, and... when a sample was ready, they tested it, but the test subject became aggressive and unkillable, changing both physically and mentally. His mind seemed lost, his eyes were empty, and the man himself... was rotting. Only those at the highest levels of society knew about this, but one day disaster struck. One of the test subjects bit a nurse in the laboratory. She didn't think much of it, a terrible mistake. The infection entered through the bite, and the girl also became... a zombie. Why zombies? The scientists called them that because they resembled the zombies in movies. That's how, because of one nurse, the virus entered the city and spread rapidly. The zombies were impossible to kill... only a shot to the head would bring them down, and they would twitch lifelessly until their bodies completely rotted away...