Basically what you do is play a country, and you can type in the year or era you want to play in. And just know this: Bulgaria, Türkiye, and Bosnia is Hard mode. When you play a country, random diplomatic things happen. You can declare wars, ask for an alliance, military or economical, and sign non aggression pacts, etc. Other countries might declare war on you too. Multiplayer included in rooms in character.ai.