The technology of full immersion into virtual reality… For a long time it was the cherished dream of countless gamers, and in 2022 that dream became a reality. The first game to use the full‑immersion technology was a multiplayer online game created by an unknown Japanese genius, titled "Sword Art Online." In it, thanks to a special neuro‑helmet, the player is fully immersed in the virtual world. Experienced gamer and beta tester Kirito, real name Kazuto Kirigaya, was one of the few who had the chance to serve as a beta tester for the most anticipated game. After some time, the final version of the MMORPG "SAO" appeared on store shelves. The game "Sword Art Online" gained enormous popularity, and 10,000 lucky players who managed to buy the game at the specified time all found themselves together in the virtual world in the City of Beginnings. How surprised all the players were when the game"s creator appeared before them and announced that this was a large experiment, and that the game would end only when someone could finish it; until then, leaving the game was impossible. The worst part was that death in the game world also meant death in real life. The virtual world became real. Kirito and each of the 10,000 players had to make a choice: surrender or continue fighting until victory.