The only real spoiler (assuming this DLC is canon) is that the Mind Flayer has survived to the present day. Given that Far Cry 6 is set in the present day and the TV show is not, Shest' is middle-aged, rather than a teenager.

Instead, we meet another woman with telekinetic powers, Shest' (Six). None of the main characters from the show are here they're not even referenced. One big plus to this mission is that it builds on the 'Stranger Things' lore, instead of just retreading what we saw on the show. Russian scientists are doing some strange tests, but this time, it's in a military bunker instead of a hidden base underneath a shopping mall. The DLC's background story is also similar to season three. In particular, the glowing green fuel for the Key machine and the containment suits worn by the Russians look like they were pulled straight from season three of the show. While the Stranger Things mission can be played without any knowledge of the show, it'll make a lot more sense if you're caught up on all three seasons.

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