Has to have all the basic functionality of the original. Here's an example: I just played for a bit and after setting a city to build something noticed a few

Has to have all the basic functionality of the original. Here's an example: I just played for a bit and after setting a city to build something noticed a few turns later that one of my easternmost cities had been taken over. When? I don't know, but there was no battle displayed and no notification. Other features that are missing are being able to see how many units you have stationed in a city, what cities are building what, notifications when upgrades are complete, etc., etc. This is why big games require oodles of developers (sadly!)