Fanfic Recommendations meet Abbott and Costello

[Black Aeronaut]

This Is No Game is an SAO fic where the players weren't logged off even after Kayaba was revealed and defeated - instead, the respawn mechanic was restored, and detail increased overnight to real-life levels, including fatigue, pain, and bleeding when injured, and as Asuna and Kirito discover by early December, pregnancy. Meanwhile, in the real world, the surviving SAO players' bodies and NerveGear all vanished in a brilliant flash of light... And in Alfheim Online, Leafa (AKA Kirito's RL sister Suguha) overhears some of the recently far more natural acting NPCs talking about how a certain floatng castle will be in flight range for the first time in centuries.

..... So in other words, they take SAO's end game... And turn it into Log Horizon?