I've been going for my first world conquest in a Paradox game. CK2, because it is my favourite. I started as William the Conqueror in 1066. I've been a bit gamey this time with strategic marriages and assassinations, but whatever. The world isn't going to conquer itself.
Spoiler Alert, click show to read:
The situation is pretty neat right now. There are four empires; Britannia, the Latin Empire, and the two Mongols. They haven't bothered me during my expansion, so I haven't yet fought any of them. Between us four, it has been a live-and-let-live situation, so far. But that's going to change very soon, because the Latin Empire is running out of heathens, and me and the Mongols are running out of easy targets.