Tajweed is a Quranic knowledge, and it is essential to provide a Quranic generation that is fluently and accurately reading the Quran. Unfortunately, previous studies depicted many students unable to read the Quran and indicated low achievement in Quranic subjects. Therefore, there is a need for efforts to create an interactive environment that can support the teaching and learning process, such as Game-Based Learning (GBL). GBL is a teaching aid that can be customized for teaching and learning and encourages students to be actively involved. Meanwhile, various factors are still being investigated in game design to ensure the success of GBL implementation, including motivational elements as an aspect of game design. Therefore, this study aims to identify the effect of GBL design on students' motivation in learning Tajweed. The game (i-Tajweed) deployed a Game Development Framework (GDF) and was tested using a quasi-experimental method on 120 students at primary schools by a purposive sampling method. The study used a set of questionnaires and a set of Tajweed Tests as the instruments for collecting data. The findings of the analysis revealed that the level of significance (0.000 < 0.05) value of the correlation coefficient (r) is 0.310. The result suggests that there is a significant correlation between student's achievement and motivation. Hence, the result proves that using GBL with motivational elements in the design can increase student motivation positively.