Play as Xtal:
Beat the game under 'normal' or 'hard' difficulty without continuing.
Play as Zulu:
Beat the the game with all eight charcters on any difficulty setting.
Fight Against Neco (The cat character):
Finish the one-player game with XTAL without using any continues. After you defeat ZULU, the XTAL logo will come in from the top of the map screen When this happens, hold L1 + L2 + R1 + R2 + Select, then press Start. then you will fight the next round against NECO instead of XTAL.
Play as Neco:
Play as XTAL or ZULU and beat the game on Normal or Hard difficulty without using a continue.
Hidden mini game:
While the game is powering up, hold down Select+Start on the second controller. Keep holding down the buttons as the developer's logo appears on the screen and the Phalanx, a full length shooter will appear.
At the Options screen, highlight the 'Speed' option and press Left+Up+L2+R2+Triangle at the same time; the background screen should turn red to confirm.
Computer vs. Computer:
At the Title Screen, press and hold L1+L2+R1+R2. While holding those buttons, press Down+Start to enter the 'Vs. Play' option. Pick any fighters and the computer will fight itself.
Beat the game to enable the color selection. To choose a different color, hold Select and press any attack button.
Beat the game in Easy mode without Continuing or losing a round. Now highlight 'Option' at the Title Screen, and hold L1+L2+R1+R2+Start+Select on controller 2. Voila! A comic strip!
Thanks to Revolution readers Kyle, Dane, Jordan Dean, Robert and Barty Lebart!