Civilization Invasion: Summon The Player To Flatten The Back Room

[The fourth natural disaster] + [pure wiki back room] + [no heroine] + [group portrait] + [micro-healing in the middle and later stages]"If you accidentally cut out of reality in the wrong place, you'll end up in the back room...""It's just rotten damp carpets, a maddening drab yellow, the never-ending hum of fluorescent lights at full blast, and some six hundred million square miles of randomly divided empty rooms that get mesmerized..."...In 203X, with the popularization of VR technology, a game called "Backrooms" quietly emerged, and tens of millions of crazy players poured into the backroom!They are immortal, dare to slash against the entity army crazily!They have the courage to swallow the sky, and dare to meet the gods with the ultimate human firepower!They are good at moving bricks, forcibly transforming dead areas into livable areas!They are the plague in the back room.Later, they gradually discovered... here, it seems that it is not a game.(Levels and abnormal items use the pure wiki version, and the original settings of M.E.G and other organizations will be modified due to the plot)