For my thesis project for the Masters of Fine Art in Film and Digital Media, I designed and produced Evelyn Offscreen, an alternate reality game (ARG) that was facilitated by interactive performance. The goal was to create an interactive experience that allowed several players to collaboratively create story across numerous media within the field of alternate reality gaming. The approach used in Evelyn Offscreen was intended to provide a degree of creative freedom to the players that has not been demonstrated in other ARG experiences and to use digital media to capture information about the relative effectiveness of the different techniques that were employed. During the month of October 2009, Evelyn Offscreen invited players to participate in an overarching story as characters. The game existed simultaneously through several media platforms such as Ning, twitter, and blogger as well as scenes located in Central Florida where players could embody their character in a real world setting. The results revealed insights into techniques for massive collaboration of story and player reactions to this hybrid form of alternate reality gaming and interactive performance.