See the Predecessor

https://store.steampowered.com/app/1254870/High_Strategy_Urukon/

About This Game

• All 40 playable realms start in different parts of the same map, with asymmetric starting conditions.
  
• Campaigns last hundreds of turns, and every realm has a unique set of cities it seeks to capture.
  
• You are not racing against the AI-controlled realms, and their reasoning is itemized in a way you can interact with.
  
• There are no arbitrary limits to how much you can expand, but even the largest realm still only gets one action per turn.
  
• A realm's capital cannot be moved, and any realm that loses its capital is immediately destroyed.
  
• Cities are surrounded by different terrains, which affect their economy, possible random events, and the ability of different armies to fight over them.
  
• The way battle works is stark: attacking and defending consumes soldiers like a currency. But there are systems for efficiency and surprise breakthroughs.
  
• Spying is an alternative or supplement to battle, and its success chance depends on the happiness of the locals.
  
• The kinds of military units available to you depend on who lives in your realm, as different cultures customarily fight in different styles.
  
• Most unit types gain experience through use, which unlocks upgrades. Units with more possible upgrades are weaker at the start, but stronger later on.
  
• There is no one-size-fits-all army composition, and changing your composition is easy. But any time you do so, you become temporarily vulnerable.
  
• Trade earns money, but the realm you're trading with earns just as much.
  
• You can quickly raise an army through conscription, but it consumes population.
  
• Almost all projects to enhance your cities are temporary and mutually exclusive.
  
• There are no AI bonuses: everybody plays by the same rules.
  
• A variety of random events will sometimes upset even the most well-laid plans.

Mature Content Description

The developers describe the content like this:

The game depicts natural calamities and intentional callous behaviour affecting populations at the demographic level.