This is HOI4, a strategy game from steam. In this game you need to conquer countrys, build your economy, make decisions on the decision tree. Each country has its own deciding tree, ex. Germany has in its tree "Danzig or War" that they can use on Poland. There are many others, like "Rhineland" but theres too much in it. You can play as any Country, just dont try to cheat. You can cheat, but you need to decide that at the start of the game. Theres much more, like division training.

Cheats, on or off? Historical fiction, on or off?

[Start Game]

You can also just be a random nation, or custom made.