XCOM: Enemy Within
The newest XCOM game from Firaxis Games has got to be one of the finest turn-based strategy experiences that the PC and consoles have to offer. It also translates remarkably well into a game for tablets, allowing players to use the touch-based interface to command their units instead of a mouse or gamepad.
Only slightly less graphically intensive than its console counterparts, the mobile version of the game contains just as much content and offers the same excitement fans of the strategy genre can come to expect from Firaxis.