Sword Art Online Episode 14 — The End Of The World
Published October 6, 2012
After a hard fought battle, the Knights of Blood Oath and other allies defeat the Skull Reaper, boss of the 75th floor. Kirito deduces that Heathcliff is, in fact, Akihiko Kayaba himself, by exposing him as an "Immortal Object". Akihiko paralyzes everyone except Kirito, and reveals that he would have been the final floor's boss. He offers Kirito the chance to face him in a one-on-one duel. If Kirito wins, Akihiko will consider the game beaten and log-out all the remaining players. After giving his best wishes to the others, Kirito accepts the challenge. Asuna sacrifices herself to save Kirito, despite the fact that she is paralyzed and so should be unable to move. Heathcliff and Kirito are both killed simultaneously and the game is declared cleared. Kirito and Asuna tell one another their real names, Kazuto Kirigaya and Asuna Yuki, and embrace as the world falls apart. To his surprise, Kazuto awakens in a hospital in the real world. Despite being physically weak, he sets off in search of the real Asuna.