Epic Games has released a walk-through demo of its upcoming RPG for iOS devices demonstrated during today’s Apple iPod event. Codenamed “Project Sword,” the game is an impressive 3D RPG with detailed real-time graphics powered by the Unreal Engine 3. In the full game, players will be able to explore a medieval town and engage in combat with other players over the Internet. The current demo, Epic Citadel, available as a free download…