Rather than pollute another thread, I'll start a new one. Bearing in mind that I am discussing forced game mechanics, not personal expectations and desires, are diamonds necessary? What are the things that only diamonds can do, and are any of them necessary to be able to unlock the last Cosntructs Tech? Diamonds can speed up production times, but you could just wait. Diamonds can unlock a tech you don't have the prequisites for it, but you can get the resources. I'm sure there are other examples where you are basically trading diamonds for time, these don't count. Diamonds can buy premium buildings. But I think you can progress with normal buildings. Diamonds can upgrade the Magic Academy, but that's really an efficiency thing, which is a time thing. The biggie in my mind, though, is Premium Expansions. There is a limit on research expansions and map expansions. Can you accomplish through to Constructs without Premium Expansions? Is there anything else I've overlooked?