A flurry of interest has arisen around the potential of digital games, simulations and interactives to promote humanities learning, spurred in part by a growing body of research on the value of educational games. Foundations and universities have invested millions of dollars into developing these games, yet many are built, tested, and promptly shelved, played by only a handful of students during the pilot testing phase. There is no comprehensive directory to connect teachers with these resources. If high quality educational games, grounded in current academic knowledge and at the forefront of the digital technologies, are to reach teachers and their students, there is a clear need to build a collaborative directory for reviewing and sharing information. Playing History is the beginning of just such a directory.