Crusader Kings 3 is a European grand-strategy RPG taking place between the 5th and 15th centuries.
Business Model: Buy-to-Play
Microtransactions: Yes, there are optional in-game purchases available.
Risky Business: Tactically utilize the few advantages at your disposal to survive and thrive in an unforgiving world of cunning cut-throats and home-grown tyrants. 'Diplomatic' actions such as setting up arranged marriages, employing espionage, and joining a political faction might not be the cleanest solutions to your problems, but sometimes it beats going to war.
Medieval Sandbox: Keep your friends close and your enemies closer on a massive map stretching from westward Spain to eastward India with Scandinavia to the north and Central Africa rounding out the south.
Successful Succession: Do everything in your power to ensure your lineage continues to rule in a world of scheming opportunists and religious zealots. After all, money and power on their own leave no legacy.