Area 51 Hat: Get to level 3-1.
Blond Hair: Beat the final boss using hard difficulty.
Diamond Tierra: Beat Level 2-2 using hard difficulty.
Jouster Hat: Beat Level 3-4 using hard difficulty.
Private Eye Hat: Beat Level 3-2 using hard difficulty.
Soviet Union Hat: Get to level 2-1.
Super Soviet Missile Master mini-game
Successfully complete level 1-5 and the Super Soviet Missile Master mini-game will be unlocked after the intermission sequence.
Dig next to a flower to get an extra life.
Indestructible bus in Level 1-2
You will be brought into the level on a bus. You will then get out and the two cars surrounding the bus have the triangle button pointing to them to climb in; however they do not point to the bus you rode in. If you get into that bus it is practically indestructible. It also destroys other cars in one hit. Watch out for the helicopters dropping bombs; they are the only thing that can destroy the car.
Chicken hat in Level 1-4
Destroy the Benemoth building. You should hear a foghorn sound to indicate that the hat has been unlocked.
Curly hair in Level 1-4
Destroy the "Fish Are Like Plants" building. You will hear a foghorn sound once the building is destroyed, and the curly hair will be unlocked.
Desert trap in Level 3-2
There is a flower in the sand; however, if you try to dig down to get it, a big green thing will eat you before you can take it.
Extra lives in Level 3-4
After fighting the Boss (giant green robot with the eye and a fork and knife) and his life reaches zero, he will start exploding. Continue shooting at his eye. He will just continue exploding as long as you shoot, and you will continue gaining points. You can stop when you have about 60,000 points. At the end of the level, you will gain about seventeen lives.
Enter "ROYGBIV" as a player name under the options menu to unlock all levels, mini-games, and hats. If you entered the code correctly, you will hear the sound of a foghorn.
Go into the options menu and enter one of the following names as a player name. Select "Submit", and you will hear the sound of a foghorn if you entered the code correctly. Go into the hat menu and the corresponding hat will be unlocked.
5(Red hair) - April
7Jheri curl) - Superfly
11(Top hat) - Grrl
13(Daisy headdress)-Princess or Betty
14(Dick Tracy hat) -Dandy
At the name prompt change your name to FBI
FBI 99 bombs and 10 lives
Enter these as a player name. When you click submit, a foghorn will sound if it was entered correctly.
Grrl Hat 11, top hat
Abe Hat 12, diamond tiara
Betty Hat 13, daisy headdress
Princess Hat 13, daisy headdress
Dandy Hat 14, Dick Tracy hat
TomFulp Hat 2, Tom Fulp
Cletus Hat 4, blonde hair
April Hat 5, red hair
Superfly Hat 7, Jheri curl
Goodman Hat 8, pirate bandana
Chicken hat, level 1-4
When you come across the Benemoth building, destroy it. A foghorn will sound, and you will have unlocked the Chicken hat.
Curly hair, level 1-4
When you find the Fish Are Like Plants building, destroy it. A foghorn will sound, and curly hair will be unlocked.
Super Soviet Missle Master mini-game
Complete level 1-5, and this mini-game will be unlocked.
Enter the name ROYGBIV for player 1 to unlock.