[Mylon]

Originally posted by PvK:
You're right - SE4 just doesn't handle complex upgrades. It's really only designed for upgrading to something of about the same cost, like in the standard game.

Your idea is a good one, although I don't know if SE4 would allow upgrades both ways (city->metropolis and city_1->city_2).

PvK

Well part if the idea is that you would remove the upgrades between cities totally and adjust the costs somewhat (Metropolises would take forever to build if they were actually 100kT! Technically they're only 65 if you build a minor city first, and you get some amount of production for some of the building time), though you _could_ design the cities in a heirarchy of minor city level 1 > minor city level 2 > minor city level 3 > metropolis level 1, ect, but I don't think it's worth the bother. Especially not since there won't be any way to upgrade to minor city level 3 if you have "cities" uncovered.

From my experience, it seems that metropolises are the most useful infrastructure simply because they're really the only facility that produces a decent amount for the investment. The cities between minor and metropolis merely add build time to getting to metropolis, thus lowering their value.