Fire Gigas may refer to:
- An enemy from the original Final Fantasy.
- An enemy from Final Fantasy II.
- The enemy from Final Fantasy Dimensions.
Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products.
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.