The HyPerion by Samuel Boyes

This story is set in a big city where the Professor Ted has managed to summon the mythical HyPerion and has made everyone go into a huge battle royale to get it, where the only one who would survive would be ted…

However, Ace (the main character of this story) has a bit of experience from playing video games such as smash bros or Fortnite or even brawl stars, he has also read books such as Skulduggery Pleasant or Percy Jackson. So he can tell who is behind all this, and how to fight and win.