The battle of the multiplayer games by finishing the Fall Guys Crown Clash challenges.
If you didn't know, Epic Games owns Fortnite, free-to-play game, it's apparently time for a celebration.
The event itself is restricted to Fall Guys – simply complete the 'Crown Clash' challenges and you'll unlock Kudos points and "free rewards," which at the moment are all just based around playing matches up to a maximum of a hundred. While not fully confirmed by Epic right now, players are currently unlocking the various free DLC items in Fortnite and Rocket League right now.
The Crown Clash event runs in Fall Guys until July 11, so you have until then to get all the rewards.
Here's a look at the Major Mancake set for Fortnite, which seems to be the highly-unrelated reward for completing the Fall Guys Crown Clash challenges alongside their items and emotes.

As a German cannibal once said, he looks delicious.
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While the Fall Guys is doing very well since going free-to-play.