Single best game from Paradox to date. The initial tutorials are now useful, although you'll still not understand much afterwards...
The scope is simply huge, play as anyone anytime in probably one of humanities most exciting eras and re-write history. Whats not to love?
While there are now 5 paid expansions, each one comes with multiple changes to the base game for everyone. Mechanics are free, features are paid for effectively, so dont feel that you have to go out and buy all the DLC. Not to mention, in mltiplayer only the host needs to have the expansions and then everyone can use them to full effect in that game, which is a great idea imo.

It may have a AAA price tag but you will definitely get your moneys worth and more from this game if you love strategy games with depth and replayability