Do you like challenging yourself? In that case this game is a great choice for you!

Europa Universalis 4 (as well as similar stratergy games from Paradox)
takes some time to learn and master. Anyhow when you get the hang
of it you should enable the Ironman mode and nab some of those
tasty achievements by planning your every move carefully.

I myself am not even close to being done with this game with 470hrs on
my record. Therefore I can tell you that this game offers awesome gameplay!

Let me summarize my opinion of the game in bullet points:

Pros:
+ Challenging and capable AI
+ Promising variety in the gameplay
+ Great Community and Workshop
+ Frequently patched

Cons:
- Expensive (especially with dlc:s).
- Tricky to learn quickly.

9/10 Awesome!

Love it but I still recommend that you pick this game and its dlc:s up at a reduced price.

NOTE: Since I currently play with plenty of dlc my experience of the game might differ from others'!