This was one of my favorite games back in the 1980s. I played it on the Atari 800. I don't really need the DOS version sold here because my Atari 800 is still up and running, and the Atari version is better than the DOS version. It has been a while since I've played it - maybe I should give it a try again and revisit my old tactic for beating the computer AI. I always used to ignore the minerals - I cornered the energy market instead. After the computer players bought out the limited supply in the store, I would sell energy to them at auction at an inflated price. They weren't smart enough to produce sufficient energy of their own, so this worked every time. The computer players could still win, however, if I had a run of bad luck, such as poor timing when purchasing land or having a M.U.L.E. run away.
Electronic Arts, which was the publisher of this game, was a good company back then. It's hard to imagine, given how much hate that company gets now, but it was one of the best. M.U.L.E., Seven Cities of Gold, Realm of Impossibility, The Return of Heracles, and Ali Baba and the Forty Thieves are all classics, and I still boot up those old floppies and play these games every now and then.