Hey guys - first time post - I've been playing Civ II again (gold edition) and I want to design a scenario that uses a map of Philip Jose Farmer's "Riverworld"- Think a canyon a mile or two wide, with sheer cliffs impassable to foot travel, and a river running down it. Now picture this canyon and river running around the world from pole to pole. Get the idea? I need impassable terrain - and I've tried editing the rules.txt, but it seems like the AI can still traverse it.
I'll use ocean for the river, so I can build boats, but I'm at a bit of a loss for info on keeping all ground troops in the canyon. (air will be allowed - they can build blimps) -