Abstract: This paper aims at investigating the effect of games on grade 10th students’ motivation in English class at Tran Hung Dao high school, Quang Ninh province and seeks to determine the extent to which using games in learning process affects the improvement in students’ motivation in learning process, how students experience the teacher’s practice and behavior and measure the students’ perceptions of the using games in learning environment with respect to its effectiveness. Questionnaire, observation and structured interview were used as the main tools to collect data. Both quantitative and qualitative data analysis methods were used to provide enough data for the present study.