This paper identifies and defines common relationships among video games and interactive media in an attempt to improve our understanding of and support conceptual data modeling in this domain. Existing models and standards such as Dublin Core, Functional Requirements for Bibliographic Records, Resource Description and Access, CIDOC Conceptual Reference Model, and Cataloging Cultural Objects do offer a variety of relationships between resources; however, many video games are related in more complex ways that cannot be adequately represented by these models and standards, especially in ways that reflect how game players understand games and how cultural heritage institutions might curate them. After thorough review of existing standards, consultation with domain experts, and examination of sample game sets, we identified and defined 11 relationship types and 4 grouping entities prevalent in the video game domain, and offer suggestions on how these might be represented in a conceptual model.