This document is a case study detailing the testing strategy employed by Pocket Gems, a video game developer and publisher, to ensure comprehensive quality assurance for their mobile games on iOS and Android platforms. The case study outlines the challenges faced by Pocket Gems, including the need for extensive testing coverage across various devices and adherence to strict release schedules. To address these challenges, a diverse range of mobile devices was maintained, and additional devices were procured to enhance testing capabilities. The team provided extended support and established a communication protocol to facilitate efficient testing processes. The outcome of the testing initiative resulted in a significant increase in coverage, with a 22% improvement on iOS and a 42% improvement on Android. Additionally, the long-term engagement of experienced resources led to a 40% rise in productivity, allowing for timely releases while ensuring all functionalities were verified across devices.