[quote=Dannaroo]
How is diplomacy with npc nations handled? Do all diplomatic actions require orders or just treaties? How are npc attitudes toward players decided? Is it just by rolls? or gm discretion? Is the historical relationship between the two nations taken into account?
[/quote]

CK2 is a PC game by Paradox Interactive. In the original version, you play as a medieval lord trying to win glory, expand your domain, and keep your dynasty alive and thriving. The mod places the game in G.R.R. Martin's book-series-world: A Song of Ice and Fire.

That said, if I might be allowed to shamelessly advertise, I do have an NRP system that has players as lesser lords in a kingdom. No where near the complexity of CK2, or any Paradox Interactive game, but I suppose it's on the more advanced end as NRPs go.

EDIT: Nvm, thought you were talking about my post. I need to go to bed.