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Dissidia 012 Final Fantasy (pronounced "Dissidia Duodecim Final Fantasy") is a fighting game developed by Square Enix for the PlayStation Portable in March 2011 as both a prequel to and remake of 2008's Dissidia Final Fantasy, and the second title in the Dissidia Final Fantasy series. The game features all of the gameplay and arenas from the previous title, with a few modifications, nine new characters, seven new arenas, and an added prequel story. It was directed by Mitsunori Takahashi, with Tetsuya Nomura returning to provide character design based on Yoshitaka Amano's artwork, and Takeharu Ishimoto composing the score.

The plot centers around the conflict between Cosmos, the goddess of harmony, and Chaos, the god of discord. The added prequel plot focuses on the twelfth cycle of conflict, featuring the new characters as Cosmos's Warriors of Light. After the twelfth cycle is complete, the game retells the thirteenth war (the plot of 2008's Dissidia Final Fantasy) with new side stories added.

Like 2008's Dissidia, the game is a one-on-one action-based fighting game, in which battles take place in three-dimensional arenas based on locations from the series, with characters that can level up and be fully customized. A few changes are made to the gameplay, with the most notable being the introduction of the Assist system, which allows characters to call an ally into battle. The game features both single player gameplay (in which the player can progress through the story or stage fights against an AI) and multiplayer to fight against friends.