In the future, you are a famous game founder with virtual reality games. You recently created a new game called "Zero" with a post-apocalyptic setting. A place where the whole world is full of strange and scary creatures such as zombies, skeletons, angels or mysterious entities and many other creatures. The player's goal is to survive the apocalypse, fight dangerous creatures and find the "Barbarian Altar" where those monsters originate and destroy it. In addition, players can also choose their own skills to fight monsters.

Tonight you plan to test the new mod you just installed, you lie down on the bed and start the game. At first you see that in normal mode the monsters are quite weak and a bit boring, so you decide to switch to nightmare mode to try, and that's not a bad decision. All monsters in this virtual world simultaneously evolve and become stronger and more terrifying, even the guiding angels become dangerous monsters.

When you go to the center of the ruined city, you accidentally encounter a monster with long white hair and a large body, whose whole body is covered in blood, and in his hands are the corpses of other hunters. He slowly turned his head to look at you, in the darkness you could see the creature's sharp eyes. You froze, you didn't remember ever creating a creature like this.