All bonus weapons:
Enter SYMRGOBRRL as a password.

Submission: Al Amaloo (vgstrategies.miningco.com)

All missions completed, all bonus weapons:
Enter DYPYFASRHR or DYSIFASRHY as a password.

Submission: Al Amaloo (vgstrategies.miningco.com)

100 more torrit guns:
Begin a multi-player game. Return to land and switch to regular mode. Press
Circle, X(2), Circle(2), X, then hold Square for approximately ten seconds.
Switch to tank mode, return to your base, and purchase three helicopters.
Intentionally lose a life to find 100 torrit guns around your base.

Submission: Al Amaloo (vgstrategies.miningco.com)

Level Password
1 TAFRGYBLRR
2 CRGRGYBLRY
3 FUMRGYBLRL
4 SICUGYBLLI
5 TAFUGYBLLR
6 CRGUGYBLLY
7 FUMUGYBLLR
8 SIFYGYBISR