Complete the following achievements to unlock Xbox Live Gamerscore points.
During the loading screen for mission one, entering the classic Konami Code will change the mission's background music to a remix of Contra's first stage!As usual, the code is Up, Up, Down, Down, Left, Right, Left, Right, B, A. This code MUST be entered before the loading of the level finishes (IE, before the Press A prompt). A voice clip of "Let's rock!" will confirm the code was entered successfully.