With this I modified most of Civ 5's settings into the way they were back in Civ 4, nonetheless keeping Civ 5's core system like one unit per tile, ranged attacks, quantities for strategic resources etc. I also added Saltpeter. This mod is up to be modified again with further adjustments.
This new version improves the animals graphically and adds both Copper and Rubber as strategical resources; I moreover added more resource requirement.