the devs at Epic Games are crafting modes that slot each type of player into Fortnite’s golden gauntlet, as if the’re collecting fans of specific genres like Thanos does with Infinity Stones.

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brought their work into the game when “Fortnite” gave players control of the reality-bending Infinity Gauntlet owned by the Avengers’ nemesis, Thanos. “As storytellers, we are motivated by ...