The aim of this paper is to present an application of a sample lesson plan which aimed to develop critical thinking skills through educational games. The participants were 46 second year pre-service English Language teachers who were taking a course titled Advanced Reading and Writing II in the Faculty of Education. The lesson plan included a set of educational games on which the students worked together in groups to solve an educational problem they had set prior to their interaction through Compad educational package. In this paper, educational games and critical thinking relationship is discussed, the procedures of the application are described along with the tutors' and researcher's observation and the preservice English Language Teaching (ELT) teachers' views on this application are shared. The findings show that although the students had been novice to educational games, they enjoyed the process and expressed that they recognize the value of such games in developing critical thinking skills while giving them a chance to develop their speaking skills by means of providing a real medium for interaction.