im a very big fan of CK2 myself, and there isnt many games like it besides other paradox strategy games, but i do recommend mount and blade: warband. its a game where you create a character and your goal is to become a lord/king in medieval europe (its set in a fictional area with mostly european based kingdoms but there is a middle eastern faction and mongol faction) by recruiting an army, training it and eventually when you get enough renown you are able to become a vassal for a king.