Description: [DSiWare] Welcome to Cowbot County, home of the robotic master race of SteamWorld! As the sheriff, you must stop the human invaders in their mad hunt for gold. Build attack robots next to the roads they roam, then watch the invaders go down. Use your robots' special skills to your advantage in this original tower defense variation where strategy and execution are equally important. There's an Easy mode for rookies, but everyone will find a unique challenge in the great Western reaches.