• Faster and Smarter Enemies

    At the options screen, highlight Original Mode, then hold A, B, C, and then press Start.

    Contributed By: Retro.

  • Round select

    At the Sega logo, on controller 2 hold d-pad left + down, A, B, C and keep holding until the next screen. The round select will appear when starting a new game.

    Contributed By: FFCrono.

Easter Eggs

  • Hidden areas shown.

    If you beat Mercs on original mode (not the arcade version) you will see in the end that they will show you where all the hidden areas are in game for each level on original mode.

    Contributed By: JF7X.

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