As an AI text-based model, I can provide you with a basic example of how to implement a simple game using JavaScript within a single HTML file. However, it won't be a fully functional GTA Vice City game, as recreating such a complex game is beyond the scope of this platform. It will be a simple text-based game just to demonstrate the concept. Here's an example:
Please note that this is just a basic example to get you started with a text-based game using JavaScript within a single HTML file. You can enhance and expand upon the game logic as per your requirements to create a more dynamic and engaging game.