Crusader Kings II is the sequel to Paradox's slightly broken, but oh so endearing 2004 game Crusader Kings. Unlike most of their other games, the focus of Crusader Kings is on creating a dynasty (like we saw in Sengoku and EU: Rome) and not a country. That adds in some RPG elements that I find make the game more enjoyable as it makes for better stories. It's more of a people and war management game than it is an economic simulator.
Pro tip from Gremlin:
I wish CK2 had some way to tell at a glance each person's opinions of other noteworthy people. This is my first Paradox game, though I come from a strong Civ background, and in Civ you can just pull up the diplomacy screen and check the colors of the lines that link all the character portraits to gauge the strength of relationships. CK2 has far too many characters operating at once for an all-inclusive relationship matrix. But a limited matrix, one with filters to show the selected person's relations to his or her family/vassals/liege/allies/neighbors/former foes/members of the same court/etc, would really help.
Right click on a character portrait, and then right click again on the icon that pops up on the left. You'll see three more options, one of which lets you star a character as interesting, and one of which lets you see that character's relationship with every other character in the game, after the manner of your own relationship tab.
New to the game? Start here: https://www.youtube.com/playlist?lis... or https://www.youtube.com/watch?v=bJho...
Excellent (written) beginner's guide can be found here. Or this written guide is also excellent.
Not sure this is for you? Watch this:
And for fun, check this out:
NOTE: All or some of the posted vids are out of date. Your best bet for up to date help is to ask in the thread as patches and expansions vastly change how the game looks and plays.