Sure! Here's a simple text-based RPG game implemented as a single HTML file using JavaScript:
This HTML file consists of JavaScript code enclosed within `
` tags. When you open it in a web browser, it will display a prompt to enter your character name. The game then starts, and you'll encounter random enemies to battle. Each battle involves attacking and defending, with the outcome depending on the player's and enemy's statistics. If the player defeats the enemy, they gain experience and move on to the next battle. If the player's health reaches zero, the game is over, and the player can choose to play again or end the game.