In carnage games, you have to shoot many enemies and to destroy many monsters. You will lead your hero and make him collect new weapons, upgrades and bonuses.
Sometimes carnage games are divided into missions that you must complete. They may look like mercenary games but they are specifically shooting games, in which we must aim, shoot, move and avoid enemies.
In Shockboots, for example, you have to shoot monsters and to explore a shed in which there are hidden bonuses.