Europa Universalis IV is expected to appear on 13 August 2013 for Linux, Windows and Mac. It was developed by Paradox Development Studio, the company that has published Crusader Kings II apart of Europa Universalis.
In 2012, Crusader Kings II was one of the best rated games on Metacritic and has got 82 out of 100 points, even 2 points more than Assassin's Creed III which appeared in the same year. Therefore, there are a lot of expectations of Europa Universalis IV that will hopefully have a lot of new features.
Europa Universalis can be pre-ordered on Steam.