A.)
  • *Huge Green Materia: Successfully win the simulated battle at
    Fort Condor.
    * Huge Yellow Materia: Prevent the Shinra train from crashing into
    North Corel.
    * Huge Blue Materia: Use the passcode to eject the Huge Materia
    from the warhead of Cid's rocket.
    * Huge Red Materia: Successfully complete the submarine attack (you
    have to sink the red sub with your missiles). Then, get in your
    silver sub and explore the sea floor near the chain of islands to
    the south. You can then extract the Red Materia from the ruined
    red submarine.


FQ