This was one of the first RTS games I ever played on the old computer of my brother. I had very fond memories of the game, and when I saw it was available on GOG, I though I would give it a shot for the nostalgia. I was aware of the reviews that pointed out at the borken ai in the hd version, but since it included the DOS, I tought it wouldn't be too bad. However, the DOS version is extremely laggy and almost unplayable preformance wise. Maybe there's a way to fix this, but I'm not aware of it at least (haven't found anything on the internet). The AI in the HD version literally does NOTHING, even on the hardest level. It just stands there and waits to be attacked. Doesn't even produce any units on its own. Great Game, but the publishers managed it to fudge it up. If they at least fixed the DOS version.....