West Slavic Kinship: Heart of Europe mod for Europa Universalis IV

Originally the main purpose of this mod was to add more depth and diversity to the West Slavic (as the name of the mod already indicates) countries such as Poland and Bohemia but later on the project has expanded to encompass the European continent as a whole, making lots of changes to north-west and southern parts of Europe as well. So everyone should be able to enjoy it now, not only people from West Slavic countries ;)

Main features:
- over 100 new provinces (mostly in Italy, Germany, the Netherlands, Poland, Bohemia, Silesia, Hungary and the Balkans, but not only)
- a lot of new cultures (Frisian, Montenegrin, Kashubian, Slovene, Szekely, German-Silesian, Slavic-Pomeranian, Samogitian, Ashkenazi-Jewish, etc.)
- extended timeline (till 1914)
- new techs and corresponding units
- 4 new institutions
- several new buildings
- the maximum number of national ideas expanded to 10
- 2 new religions (Hussitism and the Bosnian Church)
- tens of new countries (e.g.: Moravia, Samogitia, Stettin/Szczecin, Ratibor/Racibórz, Breslau/Wroclaw, Dorpat, Kuyavia, Montenegro, Ancona, Bologna, Nitra, Lesser Poland/Małopolska etc.)
- new formable nations such as: Zapadoslavia (West Slavic cultural union), Yugoslavia (South Slavic cultural union), Baltia (Baltic cultural union), Kashubia, Pruthenia (Kingdom of Old Prussians), Czechoslovakia, Danubia, Frisia, etc.)
- new historical events and decisions
- new specific national ideas for some countries