So, this was a while ago but I figured I would share my greatest CK2
Ironman save, one single game running from 769 to 1452:
Roma Invicta!
I exported the game to EU4 but that turned out disappointingly boring, it seems like there isn't a whole lot of challenging opposition left. In all honestly CK2 also turned out excruciatingly dull after I easily won a two-front war against both the Mogol and Mayan hordes. The reason why there are still a few independent Scandinavian counties left is because I didn't figure out until a couple decades before the end of the game that you can actually break truces.. I did manage to quickly conquer all of the steppes when I found out about this, but it was too late to make this save a complete world conquest.
I think my score reset after I reformed the true Roman empire out of the Byzantines, that is why it is quite low.