The Password-Lacking Marine is a Halo 3 in the level Crow's Nest. At the end of the first long, curved corridor, there is a dialogue between this Marine, who needs ammunition for himself and his comrades, and someone in an armory behind a door. The exact dialogue changes depending on difficulty, but always involves this Marine trying to get through the door without a password. The dialogue was voiced and possibly written by the creators and voices of Red vs Blue.