Shoot-em-ups are a type of video game genre that involve shooting enemies or objects on the screen. Oaters is a term used to describe a subgenre of shoot-em-ups, which typically feature a cowboy or western theme. These games often involve shooting enemies from a side-scrolling perspective, and usually involve a variety of weapons such as guns, knives, and dynamite. Oaters are popular among gamers due to their fast-paced action and exciting gameplay.