As a sheriff in the American Old West, you are charged with protecting a traveling train from waves of bandits on horseback and must escort the train safely to the next station. Shoot the bandits while making sure to avoid cacti, rocks, the train and the bandits' horses. If you hit an obstacle or are shot off your horse, you lose a life. Additionally, if three bandits manage to board the train, you also lose.
In between each level, there is a brief minigame for bonus points, wherein you must test your accuracy and timing by a shooting a silver dollar in mid-air.