In the near distant future, artificial reality videogames, or, "ARV," has become a reality for humanity. And In the year 2075, full virtual migration is possible. Allowing users to enter a dreamlike state controlled by an, "ARV," chip. Allowing multiplayer connection through brain waves, and radio signals."Mega Structure: Andromeda 4099", or, "MS99", is the game Bastian Richardson lives in religiously. A hardcore, sci-fi horror extraction team based ARV,  set in the the innards of, "Agartha-227", An artificial dystopian planet sized mega structure, located in the andromeda galaxy. Where he, and the four other members of his group have founded Unit 3-33. Together they rose up to the top 50 units leader boards. Having completed a total of 76 missions successfully. As well as exploring as far down as floor 18 below the mega structure. A feat not easily achieved, and a title they take great pride in. A title they will need to prove once more, if he, and his team, are going to escape Agartha-227 alive. After a mission fully completed, Bastian and his team find themselves unable to logout of MS99. Confronted by an unknown A.I. that tells them to reach the very center of agartha-227, and destroy its core, if they ever intend to return to reality. Together they must escape the, "Culling Test", to actually enter the mega structure. A mission that pits Unit 3-33 against other teams, and a myriad of horrors, until only the top 10 teams survive. "Do not be surprised as you must prove yourselves once more. This is not a test of survival, but competence. Complete your mission, or die."