A great game. I played and modded Civ-5 for a while but I switched to UNCIV because modding is much easier and it also runs on Android. The general game works well - all the main features are place. Not all features of the "Gods & Kings" expansion are implemented, yet. But the game development makes good progress (for a free, non-profit, open-source game). There are several great mods for this, different graphic sets for units and terrain. The AI is usually better than that of Civ-5. The game is mostly bug-free and if you find a bug, it is usually fixed pretty quickly.