Noun
shoot-em-up (plural shoot-em-ups)
Alternative spelling of shoot 'em up
With a title like something from a B-movie, The Regional Office Is Under Attack! is a wild mashup of comics, sci-fi flicks, fairy tales, shoot-em-up thrillers and literary fiction. Source: Internet
The addition of a story mode and a more prominent in-game progression scale has given the shoot-em-up zombie runner a breath of fresh air making it a delight to play. Source: Internet