Super Mario Bros is a Nintendo Entertainment System action-adventure platforming game starring Mario in a quest through the Mushroom Kingdom. The game centers on fast side-scrolling stages filled with pits, enemies, underwater areas, and timed challenges leading toward the Koopa King.

• Cleaned, tested, and guaranteed to play. Authentic cartridge.
• Run, jump, and use power-ups while navigating mountains, seas, underground sections, and castle hazards.
• The story follows the rescue of the Mushroom Princess from the evil Koopa tribe of turtles.
• Classic enemies and obstacles include turtle soldiers, bottomless pits, fire traps, and underwater threats.
• Two-player alternating play lets Mario and Luigi take turns through the adventure.
• Part of Nintendo’s NES Action Series lineup.

This entry established many core Mario elements still associated with the series, including the Mushroom Kingdom, Koopa enemies, and castle-based boss encounters.