Successfully complete adventure mode with Mecha Godzilla to unlock the Mothership level.
Play through the game on hard difficulty setting. While fighting, various buildings that you destroy will have special Atari power-ups inside. Collect these to unlock a gallery picture.
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Hold L + R + Down + Y for three seconds to toggle the following cheats on and off:
Enter “OPENSESAME” as a code at the cheat menu.
Enter “LOOSETIGER” as a code at the cheat menu.
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Pause the game at your school, then press Right, Down, Left, Up, Left(4), Y, Left. If you entered the code correctly, you will hear a sound.
Pause the game at your school, then press Right, Down, Left, Up, Left(4), Y, Right. If you entered the code correctly, you will hear a sound.
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Have a rifleman, sniper, and a demo or support. Use your sniper when the threat indicator indicates that there are men from afar (yellow). Use your rifleman when it turns orange, and your support or demo when it turns red.
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