Chain of Command: Have a subject, with a subject, with a subject
Triple Alliance, Triple Prosperity: As the Aztecs, have Tenochtitlan, Texcoco, and Tlacopan at 50 Development each, while Mexico is prosperous
Truly Roman: As the Holy Roman Empire, have Russia, the Papal State, and Byzantium as subject nations
You're not supposed to do that...: Starting as a Christian Iberian, convert to Islam and convert Europe to it
Wololo: Convert the religion of a Religious Center in under 5 months
Coast Hog Extravaganza: As Chile, Dai Viet, or Croatia, own all coastal provinces in the World
Manifest Destiny: As the United States own all of the New World as core provinces
Absolute Obliteration: Win a coalition war as the war target and fully annex the nation who started the war
Zarathustra Back in Fashion: Form Persia as a Zoroastrian Nation and convert your home region and Arabia to Zoroastrianism
The Boss-nia: Complete the HRE centralization reforms as Bosnia