The study aimed to determine the effect of game-based applications on engagement and performance of selected Grade 9 students of Looc Integrated School, Calamba City, School Year 2021-2022. It determined the students? perception on the attributes of game-based applications, level of students? engagement and the significant effect of game-based applications on students? engagement and performance. Experimental design of research was used in this study in gathering the necessary data. The researcher used a self-made pre-test and post-test and a survey questionnaire as the main instrument of the study. The data gathered were treated using appropriate treatments which are Mean, Standard Deviation, Percentage and Paired t-test. Based on the data gathered, the students perceived that the use of game-based applications was very effective, and the attributes are very appropriate. The level of engagement of the students was rated very high. The test of difference between the pre-test and post-test of the respondents resulted to rejecting the null hypothesis which implies that there is a significant difference on the performance of students. Moreover, it showed how the game-based applications significantly affect the students? engagement. The game-based applications significantly affect the engagement of students in terms of their participation and self-regulation but does not significantly affect the students? engagement in terms of their attitude towards games, focus and attention and task orientation. It can also be concluded that game-based applications have significant effect on students? performance. The researcher highly suggests the continuous use of game-based applications in online classes since teachers in the new normal education must be innovative and creative in their classes. The use of game-based applications can motivate students and can be used as an engaging way to start a class. The researcher also recommends the use of game-based applications to other learning areas and lessons.