Games or gamified activities blended with traditional ways of teaching can be implemented as a useful strategy in foreign language classrooms. Gamification as a novel pedagogical approach offers opportunities in accordance with game elements and techniques that can be applied in nongame context like classroom. This study is about an online free application called Kahoot. Kahoot has been used to stimulate students' English as their foreign language more effectively, actively and interestingly and can be accessed by teachers to use in foreign language classrooms. The aim of the study is to demonstrate Kahoot can be used as a Review Activity in foreign language classrooms and to gather information on students' perceptions about this application included in educational process. The research design for this study is action research. Kahoot was implemented three times at the end of every three units. For the quantitative part of the study, data were collected through a 20-item questionnaire including 15 participants to determine the perceptions of the use of the Kahoot. Findings of the study indicate that students were able to engage actively in the lessons and they were able to master the target language effectively and enjoy learning English using games.