This document discusses using a game called iGeo to teach geography knowledge of Austria's federal states to secondary school students. It presents the concepts of digital natives, game-based learning, and the technical implementation of iGeo. An experiment was conducted comparing the learning results of students who used iGeo versus traditional methods. The results showed the game class had higher average learning increases and knowledge retention of the federal states' locations compared to the control class. Additional findings and discussions address student motivation, usability, and the game's effectiveness as a didactic tool.