3-D, immersive games are no longer just for game machines (like the Xbox 360) or high-end desktop computers with awesome graphics cards. Mobile devices such as smart phones and tablets have now grown powerful enough to render realistic 3-D graphics and supply high-fidelity game play on the go. The release of games like "Dungeon Defenders" on Android and "Epic Citadel" on iOS show the validity of porting an existing game engine (Unreal 3) to mobile platforms. Unity3D has also seen exceptional growth with their "write once, deploy anywhere" approach to game development. This paper explores what it takes to port and distribute a 3-D immersive, combat medic simulation to mobile platforms. We will examine the selection of game engine, explore the decision process for buy versus make, look at changes in interface from a desktop application to a touch interface, detail changes in the art pipeline, take you through the process of getting the game deployed on various app stores, and look at possible alternative delivery venues. We conclude with a post-mortem on the success of the port.