kilrathu writes "Longtime proponents of using video games as sources of learning, the Federation of American Scientists put its money where its mouth is. FAS released Immune Attack, an educational video game designed to teach immunology to AP level high school students and combines the most current research on teaching methodologies with a 3D first-person shooter game. 'The key to the game was making sure it was fun while also covering accurate and complex immunology topics,' said Dr. Michelle Lucey-Roper, director of the FAS Learning Technologies Program. The game is free, although not open source, and can be downloaded here. Sorry, no Mac version yet."