Unlockables
Arcade Mode unlockable characters

Once you are far enough in the main game, the following characters will be unlocked. Kyle and Cody are available from the beginning.
Unlockable              How to Unlock
Guy                     After the cutscene that follows the training with Guy, he will be unlocked in Arcade Mode.
Haggar                  After sparring with Haggar at Pier 15 of the Pier District, he will be unlocked in Arcade Mode.


Arcade Mode unlockable stages

When you have advanced far enough in the main game, the following stages will be unlocked in Arcade Mode. Kyle's Hood is available from the beginning.
Unlockable              How to Unlock
Japantown               Unlocked after talking with the shopkeeper of the Flesh Scrawl Tattoo Parlor, when you are done with the pests minigame.
Little Italy            Unlocked after entering Little Italy for the first time.
Pier District           Unlocked after entering the Pier District via the train in the Subway following the cutscene with 2-ill.


Bonus Menu Unlockables

The following are all found under "Bonus" on the main menu once you have advanced far enough in the main game.
Unlockable              How to Unlock
Fear Factory--Archetype Unlocked after The Stiff is defeated at Bijou Hotel. A message stating "Bonus Unlocked" will appear after the cutscene in the bar.
Original Final Fight    Unlocked after The Weasel is defeated in the warehouse of Kyle's Hood. A message stating "Bonus Unlocked" will appear after the cutscene in the bar.
Shadows Fall--Inspiration on Demand	Unlocked after the second fight at the warehouse in Kyle's Hood. A message stating "Bonus Unlocked" will appear as Kyle starts in the Pier District.
Shadows Fall--What Drives the Weak	Unlocked after the Andore fight at Vito's Restaurant. A message stating "Bonus Unlocked" will appear after the cutscene in Vito's restaurant.