Wars of Liberty remade the church entirely. Now it's available for all civilizations in the game and lets you select a religion, enabling a new resource: faith. With faith you can train priests, which are now much more strategic, and research new religious technologies with amazing and game-twisting effects. Currently, there are 16 different religions, and each civilization has access to 2, plus Laicism (No Religion).
Spies are stronger than ever! Now all civilizations have access to a new building, the Safehouse, which lets you train spies. This stealthy unit is capable of planting landmines, stealthy kills and detonate bombs on enemy buildings. Watch out: Town Centers cannot reveal spies anymore, so you'll have to counter them with your explorer or with your own spies.
Who said Imperial Age was the limit? In Wars of Liberty, you'll reach the sixth age, Great War! At this highly expensive age, you'll have access to the ultimate technologies and three new types of units: airplanes, tanks and dreadnoughts!
You will notice some cultures have nasty tricks to deal with invading empires. One of them is fire, which can be started in several different ways. If you see a fire, send villagers to put it out before it spreads - or it may quickly consume your colony!
We all know Age of Empires III is a 10-year-old game. And that poor 1024x768 resolution won't last much longer. In Wars of Liberty, all user interface images are four times the original resolution, so when stretched, everything will still look sharp - even in large monitors.
Artificial Intelligence too predictable? In Wars of Liberty, the AI starts with a random personality trait that grants them a unique bonus in that game. They'll give hints of their current personality during the game. The traits are random, but you'll see some Leaders get some traits more often than others. There are 30 different personality traits.
Bored of the usual gameplay? Some Wars of Liberty random maps have special game twists for you. Avoid the dangerous area in the Bermuda Triangle or the headless knight in Deathly Hollows. Hold your breath on the Moon, keep an eye on the fog-of-war reset in the Congo.
All villagers can quickly put down a fire and don't get very injured; fire is devastating against buildings and will hurt military units as well. But keep in mind that fire burns both ways.