Play Retro Mario Bros 3 (SMB3 Hack) Online

Retro Mario Bros 3 is a fan-made hack of the original Super Mario Bros. 3, which was released by Nintendo for the NES in 1990. It takes the familiar structure of the classic game and reworks its levels, offering a fresh take on the platforming action many grew up with. The hack preserves the core mechanics and visual style of the NES era, making it feel like a natural extension of the original rather than a departure.

You control Mario as he moves through side-scrolling stages, jumping on enemies, breaking blocks, and collecting power-ups like the Super Leaf and Frog Suit. The main goal remains to reach the end of each level, defeat bosses, and progress through the world map. Signature elements include the ability to use special suits to gain new movement options, such as flying or swimming with greater control, and navigating both above ground and in fortress stages. The pacing is brisk, and the difficulty can vary depending on the level design choices made by the hacker. It feels familiar yet just different enough to make each playthrough engaging.