How about extending the game a little bit and adding a moon(s). There could be few resources on the moon like iron and gems.
There could be a great wonder "Lunar Observatory" buildable only on the moon.
Of course, the game would need to be able to handle multiple maps...
There could be a great wonder "Lunar Observatory" buildable only on the moon.
Of course, the game would need to be able to handle multiple maps...
Comment