Existing gaming controllers are limited in their end-user configurability. As a complement to current game control technology, we present the VoodooIO Gaming Kit, a real-time adaptable gaming controller. We introduce the concept of appropriable gaming devices, which allow players to define and actively reconfigure their gaming space, making it appropriate to their personal preference and gaming needs. The technology and its conceived usage are illustrated through its application to two commercially available computer games, as well as through the results of a formal user study.