As an AI language model, I can help you create a simple text-based game inspired by Call of Duty. However, please note that creating an actual game requires more complex development tools and frameworks beyond the scope of a single HTML file with JavaScript enclosed in script tags. I will provide you with a basic structure to get started, but keep in mind that this will not fully resemble a fully functional game.
Here's an example of a simple text-based game based on Call of Duty:
This example creates a text-based game where the player is prompted to enter their name and choose one of three actions: Attack enemy, Defend position, or Call for backup. The game processes the user's choice and displays an appropriate message based on the selection.
Please note that this is a very basic example with minimal gameplay. For a more immersive experience resembling Call of Duty, you'd need to use game development frameworks, graphics, and more advanced functionalities.