Within a multiplayer gaming environment, a game mediation infrastructure facilitates the creation and use of multiplayer gaming sessions. The game mediation infrastructure allows leveraging the context of an existing gameplay session within a game (e.g., the game being played, the identities of the participants) to begin a corresponding session in a game mediator application. The session in the game mediator application provides functionality—such as game-related communication capabilities—that is superior to that provided by the game itself. These actions by the game mediation infrastructure reduce or eliminate steps that would otherwise have to be performed by users, thereby greatly simplifying user coordination for multiplayer gaming.