BLACK I.C.E. is an extensive mod of HOI3 under development by Panzeroo and many other members of the Hearts Of Iron 3 forum.
Probably the most fantastic mod ever - and it doesn't just disappear after a few weeks ...or months ...or years.
Totally reconverts the game in a great experience
Extremly nice i can ply hoi3 without it
I love the extra content and the extra depth that has been put into stuff like the politics and intel.
The only thing i hear about the mod is that it crashes often, i haven't had this problem thusfar.
If you indeed suffer from many crashes, my suggestion would be to download podcats .exe (you can find it on the paradox forums, there should be a link to the .exe in the main BI mod page there, too)
The best ever
Best Mod i ever Senn
While not the most graphic game I've ever seen, this mod makes it up by its depth and countless opportunities to form WWII after your own desires.
Best WWII strategy game out there.
After the headache of getting it working, it's quite good
So many different brigade/regiment types (with some neat battalions to attach to units also). The revisions to the combat statistics work really well.
A large improvement over the base game, greatest strength lies in greatly expanding events and decisions with novel influence on gameplay.