Sure! I can provide you with a basic framework for a simple 3D adventure action game using JavaScript within a single HTML file. Here's an example:
The code above sets up the basic structure for a 3D adventure action game using JavaScript. You would need to fill in the logic to update game state and render game objects within the `gameLoop()` function. Additionally, you can customize the player controls in the `handleMouseDown()` and `handleMouseUp()` functions based on your game's requirements.
Please note that this is just a starting point, and you will need to implement the game mechanics, graphics, and other features to create a fully functional game.