Super Mario Bros. is a platform video game and it is the first game in the Super Mario series. Players control Mario, or his brother Luigi in the multiplayer mode, to explore the Mushroom Kingdom to rescue Princess Toadstool from King Koopa (later named Bowser). They traverse side-scrolling stages while avoiding hazards such as enemies and pits with the aid of power-ups such as the Super Mushroom, Fire Flower, and Starman.