Victoria II: Heart of Darkness expands on the original game by introducing new crisis mechanics, a revised naval system, and a customizable newspaper feature.
The game is available for $19.99 and retailers are also selling the original Victoria II and the first expansion at 75% off, while the three minor DLC packs (German Unit pack, Interwar Engineer Unit pack, and Songs of the Civil War music pack) are available for $1.99 each.