While the first Civilization created the genre and made history, in my opinion the third installment is the best from a technical point of view. I've never played the fourth, so I don't know, but the second was kind of wonky with all those attempts to 3D graphics. The isometric view was an improvement, but Civilization 3 has it too (and better), moreover now each nation has its own actual borders, something I was missing since the beginning. I bought it and found myself playing until 3am as if I was a kid again. Timeless, priceless.
You buy the basic game for next to nothing and then you can find tons of additional content online for free. Despite this game being almost 25 years old, it's aged very well and its community is still alive. Moreover, its mechanics are quite original, i.e. we're not talking about yet another Civilization clone etc. Seriously, I cannot imagine a deal here on GOG where you get so much for so little.
