You can buy the whole Hearts of Iron franchise for 75% off at the moment from Steam. You can check out the games via THIS link
The following are included in the package. Unfortunately there are no individual deals, just the full package. (Which is a pity as I have most of this package but not all. :(
Hearts of Iron III
Hearts of Iron III DLC: German II Spritepack
Hearts of Iron III Semper Fi: Dies Irae Götterdämmerung
Hearts of Iron III: DLC - German Sprite Pack
Hearts of Iron III: German Infantry Pack DLC
Hearts of Iron III: Japanese Infantry Pack DLC
Hearts of Iron III: Semper Fi
Hearts of Iron III: Soviet Infantry Pack DLC
Hearts of Iron III: Soviet Music Pack DLC
Hearts of Iron III: Soviet Pack DLC
Hearts of Iron III: US Pack DLC
Usyual price if bought individually £46.59, package price usually £44.99 now only
£11.25. that’s 75% off