My North Sea Norse run. The Norse Empire stretches from Scandinavia to the British Isles and Greenland beyond, far West to the island of Bermuda and down south to the Falklands, farther into the Pacific and out into Norse Zealand. It is a mighty Empire, the Empire of Oldfoundland!
I started out in Canada with a joke custom nation of Atlantean Vikings, swiftly absorbing all of North and South America's coasts, when I realized with some hilarity upon settling the West African coast that animists and fetishists were treated as Norse pagan heretics - not a heathen religion. As such, the religious war cb allowed the option of converting West African princes to Norseness... Which of course, was too irresistible a chance to refuse.
I did my best to create powerful African trade Empires, then upon ensuring their territorial integrity, set them loose upon the continent. This had the lovely benefit of creating numerous friendly nations that would allow my troops access to Africa but refuse the Christians, and even better - block all their attempts at colonizing Eastwards, resulting in Portugal getting so Poortugal, it was once nearly wholly annexed by Morocco. Poortugal was reduced down to Lisboa and would've suffered further had the African Norse not united to repel the Moroccan expedition in West Africa. Spain never founded a single colony. For that matter, almost no colonial powers existed, to the point where the principle settlers of the East Indies were the Indonesian princes (helpfully converted to Norse paganism) and the Russians.
Oldfoundland was originally an OPM in Canada, yet the ultimate goal was to reclaim the Danelaw. Naturally this meant evicting the Catholics, which the locals seemed to oppose rather vehemently. The result was to be the great clashing of Atlantean and European civilization:
For whom the only true winner was the Ottoman Empire, annexing the entirety of Austria and Hungary amidst the great war. Thereafter the Norse moved their capital to Yorkshire, provoking a great controversy and uproar back home in the Americas, with the American Atlanteans protesting that the government had forgotten their ways, protesting to such an extent that the American nations erupted into outright rebellion. Before long warlords seized control of their own private Republics, and central authority over the two continents would be shattered forever more, replaced by the great scheming game between the various alliances of such arcane nations as Republican Mexico and the Canadian Empire. Amidst all of this the Government of Oldfoundland quietly divided the British realms into smaller realms, and quietly annexed those - until such time as it could set its sights upon the realms of Denmark and Russia. Thereafter it settled Norse Zealand, and with the aid of Norse African allies, spread the good word of Odin into the interior of Africa, or confounded the politics of the Christians with a good rabble rousing round of invasion.