The game is available on several platforms depending on whether you want to play for free or support the developer for more features:

People use it to visualize "What if" history scenarios.

There are official versions available on the Google Play Store and Apple App Store . How to Use the Simulator

Since the AI handles the complex diplomacy, you can just sit back and watch the world evolve.

Use the simulation speed slider to fly through centuries of history in minutes or slow down to watch specific battles. Why it’s Popular

This is the most stable version and includes Steam Workshop support, which lets you easily download thousands of custom maps and scenarios created by other players.

It runs on almost any laptop or phone.

You can play a lite version directly in your web browser or download an older standalone version for PC/Mac.