Today's video games require users to build a complex knowledge base to navigate intricate fictional worlds. Why not build games that require players to learn about science instead? That's the goal of Immune Attack, an ambitious project of the Federation of American Scientists (FAS). You get to navigate through a 3-D representation of the human body, fighting germs and restoring a healthy immune system to a sick patient. The video game is a supplemental learning tool that aims to illuminate general principles and detailed concepts of immunology.