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Phil Spencer says he wants PS4 and Xbox One gamers to play together; Sony won't allow it.
In Fortnite, players and their friends lead a group of Heroes to reclaim and rebuild a homeland that has been left empty by a mysterious darkness only known as “the Storm.”

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E3 2018: Fortnite Cross-Play On Switch Supports Xbox One, PC, And Mobile--Not PS4 - GameSpot

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