 If you liked
Code Geass: Hangyaku no Lelouch R2
|
 ...then you might like
No Game No Life
|
Both series revolve around a main character who is a genius at playing games. The games are the central theme in no game no life (not the case for code geass). But if you liked the strategies and tactical thinking in one of the series you will most likely like the other one too. The main characters devoted their life to becoming tactical geniuses. They would do anything in order to rule the world and make it a better place.