Go to the options menu and enter your name as "GO POSTAL". Exit to the Game Select screen and quickly press Control + Right Shift + 8. A cheat menu will appear where you can choose FAST RELOAD, DAMAGE BONUS, and WEAPONS from the options menu.

FAST RELOAD lets you fire missles rapidly. DAMAGE BONUS lets you kill aliens, generators, and vehicles in one shot. WEAPONS gives you unlimited firepower.

Go to the Options menu and enter your name as "LIVE FREE". Exit to the game select screen and quickly press Control + Right Shift + 8.

Go to the options menu and enter your name as "FOX ROX". Exit to game select and quickly press Control + Right Shift + 8.

Go to the options menu and enter your name as "MR HAPPY". Exit to game select and quickly press Control + Right Shift + 8.

Go to the options menu and enter your name as "GODZILLA". Exit to game select and quickly press Control + Right Shift + 8. You will enter a cheat menu where you can select KILL CIV and KILL WING. These options let you kill civilian ground targets and your wingman.

Go to the options menu and enter your name as "TOURIST". Exit to the game select screen and quickly enter Control + Right Shift + 8. If you did it right, a cheat menu will appear where you can choose CITY, TOURIST, DEMO CAM, and NO TIME.

TOURIST mode removes all aliens from the world. DEMO CAM controls the camera with the joypad. NO TIME removes the time limit.

To unlock all the codes at once, go to options menu and enter your name as "RADARMY". Exit to the game select screen and quickly press Control + Right Shift + 8. A cheat menu should appear where you can choose all the options.