MIR4 is a game that is based around the idea of building and managing a city. There are many different aspects to the game, and here are 10 of the most interesting:

1. The game is set in the future, where cities are growing rapidly and advanced technology is commonplace.

2. Players can choose to play as one of 4 different races, each with their own unique bonuses and abilities.

3. There are many different buildings that can be constructed in the city, each with their own unique functions.

4. Players can trade resources with other players, or even sell their entire city to another player.

5. The game features an in-depth research system, where players can unlock new technologies to help improve their city.

6. The game features a complex tax system, which allows players to customize how much tax they want to pay on different types of buildings.

7. Players can create their own custom units to use in battle, or even create their own buildings.

8. The game features a detailed end-game system, where players can compete for world domination.

9. The game is constantly being updated, with new features and content being added all the time.

10. MIR4 is free to play, with no pay-to-win elements.