If you have seen football or other sports players making strange celebratory moves after scoring goals or tries that you've never seen before, chances are it has something to do with a new game called Fortnite.

The game has no single-player mode, or at least, the FAQ states there's no plan to create such a mode yet.

Instead, Fornite is a free 100-player PvP mode (player versus player) game on one giant map.

It has taken PC, Mac, Xbox and PS4 players by storm, and is now arriving on iOS as an invitation only event, at least to start, with prospective players invited to sign up to see if they can score an invitation.

Created by Epic Games, the company behind Gears of War, Unreal, Shadow Complex and the Infinite Blade series, the company says iOS players who want to take part can sign up at the Fortnite site here. 

We are told that, "as players are invited, they will receive an email with a link to download the game from the App Store", with Android to be supported "in the next few months".

Epic Games says: "Gamers can squad up, drop in, and grab their Victory Royales whenever, wherever, in the popular 100-player, last person standing mode."

More information is available here. 

A trailer of the game can be seen here:

Here's a local Rugby League player doing Fortnite inspired celebration moves:

Here's more Aussie rugby players inspired by Fortnite: 

You can see some soccer players overseas performing other Fortnite inspired moves at an article from SB Nation here. 

So, given the game's popularity thus far, it appears that when it comes to seeing one of these Fornite moves, is only "a matter of time before you see one on your TV screen", and now you have a better idea of what all the fuss is about - or perhaps you'll be motivated to check this new game out for yourself.