The Hill Gigas, also known as the GIANT in the NES version, is an enemy in the original Final Fantasy. It is one of the strongest enemies in the Cavern of Earth, second only to the Earth Elemental, and can deal powerful physical attacks that can weaken key party members.
They appear in the Cavern of Earth in the area west of the entrance. Here, every step is a random encounter with a battle containing up to three Hill Gigas and Lizards. Some players consider this part of the cavern to be an excellent level grinding location. Later, they appear around Crescent Lake, Lufenia, and Mount Gulg; their appearance in the Lufenia area also means they appear on the Peninsula of Power where they can appear in packs as large as four.
Gigas is a popular term for races of giants in fantasy games. Gigas is a Greek word meaning "giant," originally used to describe the race of Gigantes in Greek mythology and is used in the scientific name, as the specific epithet, of hundreds of species of animals and dozens of plant species to denote their size.