Book excerpt: Games have high presence in non-formal and informal segments of learning. Unfortunately, in formal education games are still often seen just as an unserious activity and the potentials of games for learning stay undiscovered. Games have high presence in non-formal and informal segments of learning. Unfortunately, in formal education games are still often seen just as an unserious activity and the potentials of games for learning stay undiscovered. How to design effective learning opportunities? Why is learning by experience often more efficient than learning by studying? How to provide the learning experiences needed to respond to current challenges? Using computer games and games in general for learning purposes offers a variety of knowledge presentations and creates opportunities to apply the knowledge within a virtual world, thus supporting and facilitating the learning process.