As part of the RiotX Arcane event, Riot Games and the Epic Games Store have reached an agreement to host all the games of the first company on the site of the second.
When installing games, you will still need to create an account with Riot Games, which will download the new launcher. The companies themselves declare their readiness for fruitful cooperation and are happy with this step.
Most likely, a big step for such an agreement was the fact that the Arcane Jinx skin is now available in Fortnite, which is part of the aforementioned event.
The RiotX Arcane event is timed to coincide with the Netflix series Arcane. The plot of the series tells us the story of the Jinx and Vai sisters. The series will premiere at Worlds 2021 and will be live streaming on November 6.