We report the development and initial evaluation of a serious game that, in conjunction with appropriately designed matching laboratory exercises, can be used to teach secure coding and Information Assurance (IA) concepts across a range of introductory computing courses. The IA Game is a role-playing serious game (RPG) in which the student travels through seven computer techno-inspired environments (IA concept rooms); in each environment he/she learns a different IA concept. After playing each level, the student completes a related CS educational module comprised of a theory lesson and a lab assignment. The game is being created with a user-centered iterative approach that includes two forms of evaluation: formative and summative. In this article we describe the design and development of the first four levels of the game, and report the findings of an initial formative evaluation of two game levels with a group of undergraduate students. (Contains 4 tables and 8 figures.)