Play has always been one of the most important activities for the human development. Nowadays, in the digital era, this phenomenon has even increased. Currently, the human race spends more than 3 billion hours a week playing videogames. People get very engaged in playing and, in particular, the youngest segment of the global population spends more time gaming than in a classroom. Young people show incredible skills of focus and problem solving while playing. A good design can take advantage of this means in order to provide games that are not only pure entertainment but that can also help people to achieve their goals remaining motivated. Games can help people to learn or to do physical exercise having fun, transforming every important task in pleasant experience.