By only focusing on a single element in the media-sleep relationship such as violence or vigilance, conclusions drawn from current research are limited in usefulness when developing targeted interventions in clinical settings. Thus, the SLUMBER study seeks to extend upon this research by exploring the elemental characteristics of bedtime media use associated with sleep problems in early adolescents. After expanding upon the V2 Matrix, researchers hopefully gain a more holistic view of video game features that may impact sleep. The V2 Matrix is a rating sheet that allows rating based on game characteristics including violence, vigilance, art style and perspective. However, due to the subjective results from having individual raters, a training and rating protocol was developed to standardize the rating process in a way that is accessible and produces consistent data for researchers. Together, the V2 Matrix and the rating protocol allow us to identify the media content and design characteristics that affect the media-sleep relationship as well as behavior and health. 53 total versions of 42 different mobile games were rated using the V2 Matrix. From data across three entries, we found that games with high continuous vigilance (34.58%) and games with no vigilance (24.5%) make up the largest segments of our current game pool respectively in terms of vigilance. When looking at harm and violence, games with no violence (42.14%) and low violence (21.38%) make up the largest segments of the game pool, respectively. Additionally, a large majority of games contain no gore (68.5%). Concluding, we hope to develop a massive searchable database of game ratings across a broad spectrum of platforms and genres for researchers and primary care providers. In doing so, we will widen the scope of research into the relationships between media, childhood sleep, and behavioral health and develop more individualized interventions and recommendations.