http://www.eurogamer.net/articles/2017-09-18-playstation-4-and-xbox-one-cross-platform-play-switched-on-in-fortnite-players-report To sum it up a reddit PS4 user was suspicious when he noticed the person who killed him had a space in his gamertag (which is something that PSN does not allow on their names and Xbox does). He searched up the gamertag on Xbox and to his luck it did show up. The developer EPIC quickly pointed out that this was an error but they confirmed that PS4 and XB1 were able to play for a while. What are your thoughts on this? Here is a link of a clip showing proof of crossplay with PS4 and XB1. https://www.twitch.tv/videos/175127882