Dissidia Final Fantasy is a sub-franchise of fighting games in the Final Fantasy series. It is a crossover containing characters and locations from other games in the series, and having them fight against one another in a battle between two gods, originally between Cosmos and Chaos, and later between Spiritus and Materia.
- Dissidia Final Fantasy (2008): The first title. Released on the PlayStation Portable, Dissidia Final Fantasy featured duel battles between two of twenty characters from the series in a three dimensional environment based on areas from the series. It features a campaign centered around the Warriors of Cosmos as they fight to defeat the Warriors of Chaos.
- Dissidia 012 Final Fantasy: An expanded prequel to the original, also on PlayStation Portable, with similar but improved gameplay, as well as new characters introduced. It features eight new characters, a campaign serving as a prequel to the original, as well as the original campaign.
- Dissidia Final Fantasy NT: A game developed by Team Ninja and released on arcades in Japan as Dissidia Final Fantasy, later ported to PlayStation 4 and released worldwide as Dissidia Final Fantasy NT. It features three-versus-three battles with a class system for characters, in which characters are either Vanguard, Assassin, Marksman or Specialist. Playable in offline play against AI or online multiplayer, it has additional characters added through updates. Its story is based around the gods Spiritus and Materia, though there is no campaign mode.
- Dissidia Final Fantasy Opera Omnia: A mobile game with a combat system more similar to a traditional JRPG, with a story based around the gods Spiritis and Materia.
Dissidia is the plural form of discidium, alternatively spelled dissidium, meaning "discord, disagreement". It is related to the verb dissidere, "to disagree"; this and related terms have given rise to words in various languages with similarly intended meaning (e.g. English dissident, Italian dissidio, Portuguese dissidente).