Its a game of survival. They offer $10M if you can be the last one standing. Which means, you have to kill others to survive except all contestants are experienced in combat or weapons, including you.

You’re with your rifle waiting for someone to come so you can shoot. That’s when a guy stopped in his tracks, right in your trap. But you’re shocked when he looks at you with eyes that kill. He smirks and disappears, appearing behind you with his sword against your throat

“Found another rat.”