EU5 Mechanics

Each guide states the patch its data was verified against; the official wiki lags the game, so 1.2/1.3 deltas here come straight from the patch notes.

• Advances, Ages, and Institutions in EU5: How Research Actually Works
• Buildings in EU5: Goods In, Goods Out, Workers in Between
• Control in EU5: Why Owning a Province Isn't Having It
• Culture, Language, and Integration in EU5
• Diplomacy in EU5: Opinion, Antagonism, and the Great Power Game
• Economy in EU5: Tax Base, the 5% Minting Rule, and Staying Solvent
• Estates in EU5: Power, Satisfaction, and the 1.3 Identity Rework
• Laws, Government Reforms, and Societal Values in EU5
• Pops in EU5: The Population Engine Everything Else Runs On
• The Cabinet in EU5: Your Country's Only Pair of Hands
• Trade and Markets in EU5: Attraction, Access, and the Burgher Black Box
• Warfare in EU5: Casus Belli, Warscore, and Why Fair Fights Lose