I've just lately been rediscovering Civ 1, one of my favourite childhood games, and was running a chieftain game on Earth because someone had said there was a limit of 48 cities, which I was sure wasn't true, and this game proved that point. Now having done all that, sitting pretty comfortably, either completing the Manhattan Project or researching Future Techs triggered an amazing glitch on the Earth Map. Four extra rows have appeared in the Arctic area, as you can see, I've actually now colonised some of the areas. The squares in these areas have some unusual properties. Unresourced grassland can be moved along like a railroad, but it actually has zero food and cannot be irrigated or mined or anything. Oh, and those barbarian nuclear units? Don't panic, they're not units at all, but squares with 32 food, 40 resources, and 71 trade. This makes these very fast growing cities indeed. The only drawback is the graphics don't handle the extra 4 rows very well, so you kind of have to click lower down than you usually would to view the new area properly. Yes, that city grew to a size of 25 in about as many turns. Let's have a look in there too: The other danger is that even with Mass Transits, Recycling Centres, the Hoover Dam, and so on, using those Nuke squares can lead to some possibility of pollution. I had managed to trigger this glitch once before, but some pesky barbarians ended up on an infinitely moving grassland square, and simply moved backwards and forwards for eternity, so it figures that it should be attainable again, if it's interesting to you. I have uploaded a few more screenshots if you're interested. It's certainly brightened up what was a very dull game on Earth I was playing. It reminds me a little of the HP Lovecraft novel, At The Mountains Of Madness, although these unchartered discoveries are in the Arctic, rather than the Antartctic. I find the presence of what initially looks like barbarian nuclear units, and those blood-pink tinges on some of the squares in the world map particularly chilling. Anyone got any thoughts on this?