Sure! Here's an example of a Dungeons and Dragons (DND) style turn-based RPG game with six classes and perks. The game will be implemented as a single HTML file with JavaScript enclosed in script tags:
Welcome to the DND RPG Game!
This is a basic example of a game that sets up the player's name, class, level, health, and mana. It also includes six different classes with their respective attributes and special attacks.
To play the finished game, you would need to add the battle logic and user interactions within the `startBattle` function. You can implement turn-based combat mechanics, enemy encounters, leveling up, and other gameplay features.
Note: This is just a starting point, and you can expand upon it to create a more complex and engaging RPG game based on your requirements.