This is THE BEST GAME EVER.
Firstly, even excluding mods it covers:
- WWII, including a two pre-war startdates
- Beginings of Cold War/post WWII restructuring of the world stage.
Second, the features are awesome. You can trade and claim land, determine your government type, install puppet nations, preform espionage, and found alliances.
It has a boat-load of events and decisions, too. And they are not deterministic, the game is not a complete sandbox, but it has several alternative paths, nations, and events for several senarios.
Best of all, its entirely moddable, and has some amazing mods. It has mods to improve each senario and even a killer mod to add in Cold War Senarios and events.
And the best thing? Its still being worked on~