The fact that a Civ game has "years" is almost useless. It's an arbitrary aspect. You see the results instantly, so where's the time it takes? It would be a good idea to give them a movement rate. In Civ I, leaving a city with Rails cost you 1/3 movement point, but all Rails in between were 0 movement. This simulated the start/stop of train stations. would be nice to see that again. Oh, and in ToT, units became trains as they traversed Rails. wouldn't THAT be cool to see again!