Europa Universalis IV as Crusader Kings 2 puts the player in command of an entire nation, making him responsible for everything from war to commerce and religion. The complexity is huge, but the freedom the game gives us is equivalent. Nothing forces us to play as happened in history. Can start with Portugal and instead of trying to explore the seas, may try to create an empire conquered by the sword. Not easy, but Europa Universalis IV makes all these possible paths, however the realism of the game is great and conquer europe with a small country through direct conquest is impossible.