In this research study, the effects of educational games on achievement and retention has been investigated in teaching social science subjects. During the research which has been carried out on two different groups and social studies classes with pupils of grade 5 at Atatürk Elementary School and Koç Elementary School in Bolu, while the experimental group was taught in educational games, the control groups was taught in traditional method. Data have been collected by applying pre-test, post test, retention test. This data are analyzed by using arithmetic means and standard deviation and ''t'' test.