The purpose of this research was to investigate the effectiveness of computer games in learning English as a foreign language and the extent to which they increase motivation in young students. More particularly, this research investigated the validity of the hypothesis that computer games are a particularly motivating means for young students to learn English vocabulary effectively in comparison to other approaches suggested by the Greek National Curriculum. The grade, in which this research was conducted, was the 4th grade of Primary school as it is a borderline grade in which greater demands are imposed on the students of this age group and language level regarding, mainly, their reading and writing skills as in this class, for the first time, it is explicitly stated by the national curriculum that literacy is one of the three basic axons upon which English language learning should be developed. All in all, the results of this research shed light on the effects which new technologies have on language learning as well as their ability to motivate students to learn English. The results of this research will also be used as a basis upon which specific suggestions for the practical implementation of computer games in the everyday classroom can be made.