Over the years, video games have made a habit of reusing certain environmental objects. The plain crate, which can be broken or pushed, is a common sight. The explosive red barrel is another, and can be found in many action games. So can waist-high walls, to either provide cover for the player or prevent them from leaving the play area. Seasoned gamers have gotten used to seeing these sorts of recurring cliches across many games, and it usually takes a more experimental title to break away from staples.