GUIDE · AGE PROGRESSION
Castle Age
Castles and stronger military upgrades reshape the match. Players can field more specialized forces, expand into contested ground, and build toward Imperial Age research.

Overview
Castles and stronger military upgrades reshape the match. Players can field more specialized forces, expand into contested ground, and build toward Imperial Age research.
How this system affects decisions
Treat research as a sequence of choices: check its building, Age, prerequisite, cost, and the units or economy affected. An upgrade is most valuable when it arrives before the army needs it and improves enough of the units already in production; researching every available technology is rarely the best use of a limited stockpile.
How to use this reference
Castles and stronger military upgrades reshape the match. Players can field more specialized forces, expand into contested ground, and build toward Imperial Age research. Research availability is part of the civilization’s tech tree: verify its required building and Age, then compare its cost with the units or upgrades the same resources could otherwise fund.
- Also known as
- Castle Age (Age of Empires II)
- Focus
- Age progression
- Signature / category
- How it works
- Release / context
- Age of Empires II system
- Region
- Age progression
- Classification
- Game systems