Sure! Here's an example of a simple text-based RPG game implemented as a single HTML file using JavaScript. Please note that this implementation assumes basic knowledge of HTML, CSS, and JavaScript.
This code represents an RPG where the player progresses through a series of rooms by choosing doors. The initial room is Room 1, and the player will be presented with descriptions of the current room and the available doors to choose from. Based on the chosen door, the player will either progress to the next room or encounter a dead-end or game over scenario.
Please note that this implementation uses `console.log` to display the game information in the console. To make it visually interactive, you would need to modify the code to display the relevant information on the webpage itself.