EU 4 is the first in this series that I have played, jumping over from the Hearts of Iron series. If your a fan of history and strategy this game is really immmersive to sink your time into.

Lots of events that let you make decisions and a rich tech and policy tree to really shape the direction you want to lead your empire in. Throw in lots of random events to keep you on your toes and you will never quite get the same game twice.