Apocalyptic Game: Starting with Search, Fight and Retreat in the Secret Realm

That day, countless secret realms descended all over the world, and the world seemed to become a game. Countless strange monsters emerged from the secret realm, including zombies, ghouls, vampires, flying demons, bone dragons, seraphs... Killing a zombie gives you 30 experience points. When the experience bar is full, you can immediately upgrade. Upgrading can give you attribute points, and attribute points can strengthen your body and make you truly powerful. In the secret realm, various props, weapons, materials, production drawings, skill stones, and even professional drawings are constantly being produced, exactly the same as in the game. Yes, people actually thought maybe this was a game at first. Until I saw with my own eyes the first living person killed by the monster's claws, until I saw with my own eyes the eyeballs that covered the sky like cannonballs crashing into the human city, and I saw the huge claws tearing apart the earth and tearing up the sky! Only then did humans understand that the world has become a game field, but humans are no longer the protagonists of the game!