I really would like a game mode (probably optional) with a renewable economy. As it is now, after a couple of hours an average-sized map runs out of resources, so you have to win or lose before that. In this mode, one would be able (especially on very big/giant maps) to create a true "empire", a strong civilization which can win or lose a battle without being completely defeated, resulting in much longer and elaborated matches, where the economic choices and the diplomacy would play a very important role (of course a prerequisite for this would be an option to save the game). To achieve this, I would make (again, optionally) these changes: - Forests re-grow, unless a player completely destroys them (which actually happened in some Greek islands in the past: now they are empty, but 2500 years ago they had woods and forests which were used to build ships ans do on). - When a building is destroyed, it becomes a ruin which can be mined like a normal mine (which was so common in the past that half Rome was built with stone from roman monuments). So, while the total stone or metal is limited, it can be recycled. - Farms auto-regenerate, requiring about 1/3 of the food they produced (that was the best efficiency achieved in the Roman Empire). - Fish reproduce itself, unless you make it extinct. This game mode might be called "renewable" or "unlimited".