What three movies have in common?

•      They both wandering around whenever they are in a different location.
•      They both have a difficult time in their lives.
•      Difficult time getting along.
•      The setting of their travels was gloomy.
•      They try to make a good life.
•      Have a hard to finding food.
•      Uncomfortable, and indecent place to sleep.
•      The first and third movie showed in black & white
•      The first and second movie showed two main characters traveling.
•      First and third showed guns
•      Both of the movies are showing different character who are outlaws