The final preorder bonus for Paradox Interactive's eagerly-anticipated PC/Mac grand strategy Europa Universalis IV has been revealed — a save game converter for Kotaku 2012 Game of the Year nominee Crusader Kings II, and a free copy of that game for those unfortunate enough to not own it already.

Civilization and Total War are often seen as the big fish in the field of PC strategy games, but for those who are a little more serious about the nuts and bolts of managing an empire, one series often stands above all others: Paradox's Europa Universalis.