I bought the upgrade on sale, but GOG added the entire game to my library, which may be usual now to keep things simple; in any case, on my older pc it runs great and looks far better than the original. If one is installing mods, as I do lightly, these will only work updated or for this version of the game. But I am presently playing with no mods; I enjoy it more as-is than even the original, I also gave five stars: five and a half therefore for THIS one...
Again, reminds me of some other games I like, also mentioned by Others; and again, have no problem with this, and is also totally different in content from the others I love. So, what's NOT to LOVE?
Again, running this on my slightly upgraded, still i5, (now 4GB 1050 graphics), 16GB system memory; and I have no issues -- only more immersive and fun than even the Orginal I enjoyed and completed. It especially looks so much better, with maybe some minor changes otherwise: like playing a Different game all over again. Lol. WEIRD; and FUN, FUN, FUN! the way I like games; VERY glad I bought it! :-)