XCom: Enemy Unknown is good
Civ5 - is also good if you realize the difference between it and Civ4. The main difference that people didn't like at first was that you couldnt stack massive amounts of armies on one square. I hated this at first too. Civ5 lets you only have one unit per square which feels limiting at first but then you realize the game has become much more dependent on positioning of your units on the battlefield - which is more difficult but cool. Who cares if your horse units have an advantage over your archers if your archers are buried in a stack of 50 other units? Nobody. The game also is much more dependent on topography. It can be frustrating if you don't understand that. The game is not dumbed down.