Twilight had been sent to a parallel world by (an impostor of) Cadance after Twilight had confronted her at the wedding rehearsal. She'll end up having to go through more than one in order to get home.

Twilight has the power of The Gamer. Let's just say things are a little different.

Twilight had been sent to a parallel world by Cadance after Twilight had confronted her at the wedding rehearsal. She'll end up having to take the place of the Hero from the game in the title.

Twilight dies, then finds out her life's a game. Chaos ensues.

Chrysalis sent Twilight to another dimension, specifically, Karakura Town

Twilight gets sent to the Campione universe, she becomes a Campione, and becomes involved in the events of that universe.