I also completed this game like 3 weeks ago. For maybe 6th time. This time it was first time with Steam version. All previous versions were original ones from CD-ROM
I recently completed this, but the standard way as shown here was too difficult. I rushed the Dorians right off the start and neutralized all of their military, which made the rest of the scenario a breeze.
processor 133 MHz or more, graphics card minim 2 MB, 16 MB RAM, but I think you can no longer find these components. If you have a PC running windows xp it is enough