Clash Royale isn't the first game you'd think of when it comes to esports, but for the 16 players taking part in the World Championship tomorrow, December 3, it's their life.
It could be time to start taking notice of mobile esports too, as there's a share of $400,000 (£297,000) up for grabs, with $150,000 (£111,000) going to the eventual winner.
Plus, tomorrow's event is going to be held at the Copper Box Arena in London, one of the venues for the 2012 Olympic Games.
The Crown Championship World Finals will be held tomorrow at London's Copper Box Arena
The Copper Box Arena was one of the various venues for the London 2012 Olympic Games
'I like to think we're channeling the Olympic spirit, as we're bringing the best players in the world here to compete,' said Tim Ebner, Head of Esports at developer Supercell.
'A fun coincidence is that our production partner for the event, Done and Dusted, also produced the opening ceremony for the Olympics in 2012. It should be a good show, as these guys know what they're doing.'
'We wanted to create something which is perfect for existing Clash Royale players, but also create something which is easy to understand for a broader audience,' said the Creative Director for the World Championship project.
'Having people who've created Super Bowl half time shows, Victoria's Secret fashion shows, and Olympic opening ceremonies would understand that aspect of the production.'
As for the set, the Copper Box Arena has been transformed into a Clash Royale style stage for the weekend.
The Copper Box Arena has been transformed into a Clash Royale-style stage for tomorrow
'We took inspiration from the Legendary Arena, the highest level arena we have in the game, with the golden crown and the king statues. It's familiar to Clash Royale players, but also very Olympic like.
'We've got something like 8,000 square feet of projection surfaces to bring the game to life. Every spectator is a VIP.'
There's a giant central screen which will show the gameplay, and then an even bigger projection surface on the floor which separates the two players, who will play from two towers raised above the floor.
'We could have a small stage and place the players side by side, but it wouldn't feel for the audience that these guys are fighting against each other.
There's a $400,000 prize pool up for grabs, and everyone will win money even if they lose
'The floor has multiple uses. We'll have gameplay on that as well, but it's also a storyteller. For example, in the opening ceremony we'll have the players walking on the projection of a globe, and they'll stand on the country they're representing.
'Then they'll be standing on one side, and the tournament bracket will be projected around them, showing the patch to the crown at the end.'
So how has Clash Royale got to this point? It's only been around since early 2016, and it's already got a huge player base and plenty of people watching tournaments online.
To make things more impressive, there weren't originally plans for an esport aspect to the game.
'We test games internally before we release them,' said Ebner. 'It was fun, but it got way more fun when we started doing tournaments within the company. We realised this makes the game better, and when we released the game, players had more fun once there was a competitive scene.'
Supercell built the qualifying tournament for this year's Crown Championship directly into the game. As a result, 27 million people tried to get to the World Championship tomorrow. Only the top 16 made it.
The players in the final are surprised at just how much it's grown, even in the last six months.
Colton Wall is from the USA, and paid someone $10 to take him to his first Clash tournament
'From the first tournament I attended about a year ago, the prize pools are now bigger, more people are being included, the qualifiers are being run better,' said Colton Wall from the USA. 'As a player I've enjoyed it,