The Last of Us Season 2 introduces Kaitlyn Dever's Abby, a central character to the story. Obviously any adaptation will make changes to fit the medium, and that's no different for Season 2 with respect to Abby's story.
In the game, players are introduced to Abby by way of a cutscene (via GamesRadar) that transitions to players taking control of Abby as the playable character for a period of time. This allows players to "immediately form an empathetic connection" with Abby because you're playing as her, writer Neil Druckmann said during an interview attended by Entertainment Weekly.
Obviously, the TV show is not interactive, so Druckmann and the team changed things up, including the timeline. As fans will recall, they only learn about Abby's backstory after a certain major event plays out, with the game then going back in time to see how things came to be from Abby's perspective.
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