Super Mario Bros. 3 is a platform game developed and published by Nintendo for the Nintendo Entertainment System. The game is the third installment in the Super Mario Bros. series and follows Mario and Luigi as they attempt to rescue Princess Peach from the evil King Bowser and his children, the Koopalings. The game is set in the Mushroom Kingdom and features a variety of obstacles and challenges for Mario and Luigi to overcome, including enemies, gaps, and obstacles. The game introduces a number of new power-ups and abilities for Mario and Luigi, including the Super Leaf, which gives them the ability to fly, and the Frog Suit, which allows them to swim faster and jump higher. The game was well-received for its challenging gameplay and colorful graphics.