Victoria II: A House Divided v2.31 Patch

Lots of gameplay tweaks, bug fixes and various enhancements
Paradox Interactive also issued a patch for Victoria II: A House Divided, the first expansion for their internally developed Grand Strategy title Victoria II (thanks: The Patches Scrolls). Victoria II: A House Divided introduces a new starting point in 1861 allowing players to experience the US Civil War from the start, from the era of absolute monarchies, encompassing expansion and colonization, culminating in the emergence of the US as a global superpower at the dawn of the 20th century.
A playable demo can be found here.