Bonus fighters
At the "Press Start" screen, press Down, Right(2), Up, Start to unlock Testament and Dizzy in all game modes.
Play as Testament
Complete complete arcade mode or reach survival level 20 in survival mode and defeat Testament to unlock him in all modes.
Play as Dizzy
Reach survival level 30 in survival mode and defeat Dizzy to unlock her in all modes.
Guilty Gear mode
Reach survival level 100 in survival mode and defeat the final opponent to unlock Guilty Gear mode under the options screen.