ATROFIL THE KEY - Mac

Summary
This is the story of Sonya that plunged into a world completely different from the one she was used to.
The events of this game begin in a small town, after a massive fall of meteorites.
Together with meteorites, a virus enters the planet that causes an epidemic among the human population.
Sonya is surrounded by people infected with the virus.
When she tries to get out of this town she has an accident.
Having woken up in an unknown room with a headache, Sonya cannot remember what happened.
The girl is placed in a separate house with some "other" people.
On her desk is a note from Dmitry, the man who saved her.
Sonya leaves the house in search of someone able to explain what happened.
When she finds Dmitry, he tells her about the shocking facts - those "others" are no longer people at all, although they were once them. Now these are bloodthirsty monsters called Atrophils.
Dmitry explains to her what is happening and teaches shooting.
Sonya observe the difficult situation with the defense, she decides to help restrain the Atrophil attack along with the soldiers.
After that, she becomes ill and Sonya returns to a safe place.
In the future, everything gets out of control, and she has to leave the place, which Dmitry gave the name Home.