Sure! Here's a simple implementation of a first-person shooter game Battle Royale using JavaScript and HTML. Please note that this is a basic example and might require additional development to become a fully functional game.
This is a starting point for the Battle Royale game you described. You can add more functionality like shooting mechanics, different guns, AI behavior for bots, collision detection, and more. Let your creativity guide you in enhancing this basic game into a full-fledged Battle Royale experience.