Familiarity breeds contentment. That seems to be the message from Ensemble Studios, the creators of strategy games whose successes are measured in millions of copies. This is the fourth Age game, and still its fundamental structure is the same: build structures, collect resources, churn out soldiers, attack the enemy."We wanted it to be familiar but not the same," admits Bruce Shelley, Age senior designer. "It's the Age of Empires II gameplay that'll keep you coming back." It's surprisingly