They have HORNS is a Action, Indie, Casual PC game, developed by Paul Piepenhagen, available on Steam and published by Paul Piepenhagen.
They have HORNS is a fast topdown shooter in which it is essential to listen to his intuition in order to stand as long as possible the enemy hordes. Easy to learn, but hard to master. The up to 4 player coop mode works very simple via plugn play.