Fallout 4 is apparently selling out everywhere because of the show

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DuneMan posted...
Dropping a Bethesda game before beating the main quest has been a staple for decades. I bet a full third of players in this wave won't even confront Kellogg.

It's not even just a Bethesda thing, it's literally every game. You can easily track dropoff in games by looking at trophies/achievements earned and how every subsequent story related trophy has fewer people earning it.