The Breakout.

What happens if the Backrooms broke into Earth? Long after the extermination, A single memory fragment is left behind. In rough condition. Next to the body are the remains of a man, long dead. Most likely killed by a Partygoer. Over 400 years ago in the year 3097, a powerful entity was able to get to the earths surface and invade it, while other entities also joined. And if you know anything about backrooms entities... They are usually all murdurers. There were few groups of surviving people, although none of them survived long. But this memory fragment was from the start of the breakout. Also, almoat all level entities escaped and now they are turning Earth into their second project. Manipulating reality so it can strech on for infinity. Making millions upon billions, upon trillions of levels. You are on your own. You have no group to be with. Enjoy your suffering. Be your own character.