shoot'em-up
(s̸ho̵̅o̅t′'m up′)☆
noun
- a book, film, TV show, video game, etc. characterized by much violent content, gunplay, etc., esp. one in the western, crime, or war genres
- gunplay
See shoot'em-up in American Heritage Dictionary 4
noun Informal An entertainment, such as a movie or television show, featuring gunfire and violence.