The evil Ganon invades the land of Hyrule and steals the Triforce of Power. Princess Zelda, sensing danger, splits the Triforce of Wisdom into eight pieces and hides the pieces from Ganon and his minions in eight separate dungeons. Enraged, Ganon imprisons the princess, but not before Zelda dispatches Impa to find a savior. Impa finds the young Link and gives him his task: Reassemble the Triforce, defeat Ganon, and rescue the princess Zelda.
The Legend of Zelda's underworld was a tangled mess of deadly traps - a maze of twisty passages, none alike. Rooms were connected to the north, south, east, and west by open doors, locked doors, switch doors, one-way doors, and even bombed-out passageways. Old men (and hungry Goriyas) lived in these dungeons and dispensed poorly translated advice to would-be adventurers.
Link could wield a wooden, white, or magical sword and wear a blue or red ring to increase his defensive strength. A regular shield repelled most projectiles, but a magical shield defended against fireballs and magic. Heart containers (either found or won) increased Link's life force. The boomerang retrieved items from afar, while bombs damaged foes and opened blocked passageways. Candles burned bushes and lit up darkened rooms. Wooden and silver arrows could be shot for the cost of a rupee apiece. You could cross rivers with a ladder; cross lakes with a raft. The power bracelet let you push heavy things. A magic wand and book let Link send Wizzrobes packing with a taste of their own medicine.