Sure! I can help you create a simplified version of a strategy game based on "The 100" TV show, incorporating elements like politics, economics, natural disasters, and unexpected events like an alien invasion. Since it needs to be implemented as a single HTML file, I will write the game using JavaScript enclosed in script tags. Keep in mind that this will be a simplified version and won't include all the features of games like Risk, Age of Empires, or Settlers of Catan. Here's an example:
The 100 Strategy Game
In this example, I've set up the basic structure of the HTML file, including a title, a map element, and an initial game state object. You can further develop the game logic based on the provided starting point. Remember to replace the map logic, game mechanics, and events according to your desired game design.
Note that this is a simplified version, and creating a full-fledged strategy game like the ones mentioned (Risk, Age of Empires, Settlers of Catan) would require significantly more code and resources.