elmowilk, I’m working on the upgrade system. It will partially follow 1800s inventions, e.g.:
Dynamite: unlocks Tunneling / some Terraforming
Food Canning: more durable Food, but needs Steel
Photograph and Phonograph: satisfy Entertainment needsWhich inventions would you like to see?
Isometric city where two steelworks are placed and a railway is extended from the main stations.