Methods and systems for dynamically incorporating advertising content into multimedia environments, such as games, are provided. Example embodiments include a dynamic inserter, which selects content, based upon a set of criteria, to deliver to a receiving client system, such as a game client. The receiving client system typically dynamically determines locations within the game where advertisements are desirably inserted. Associated with these locations are ad tags that specify criteria for the ads including, for example ad type, ad genre, and scheduling information, which are sent by the client system to the dynamic inserter to select appropriate ads. The dynamic inserter selects ads based upon the criteria and sends them to the client system, which selects them for ad tags with conforming criteria. The client system then renders the selected ad in the appropriate location.