i like the games like civilization with more than 4 resources some ideas: -food (animals,farms,fishing.......for upgrades,units) -wood (for buildings,upgrades and buildings) -steel (mines, for units and upgrades) -wealth (mines,trade....buy resources,upgrades and buildings) -stone (mines, buildings) -water (next to rivers,with aqueducts,needed for some buildings,unit hit points,etc...) in the water for example it would be cool to create water channels for eye candy or defenseive purposes and stone to create buildings like walls,monuments and bridges sorry for my english xD