Darkest Hour

Darkest Hour is a stand-alone Hearts of Iron II game
featuring a mixture of short and in-depth campaigns set
across the darkest chapters of the 20th century, from
the outbreak of the Great War up to the onset of the
Cold War.

Darkest Hour introduces a new artificial intelligence that
is now able to react to hundreds of different situations
simultaneously, along with a dynamic diplomatic system
that will allow the player to have a real impact on the
course of history.