At the pause screen press Triangle, Square, Triangle, Left, R1 and you should have a shotgun...
Kronn Warrior & Infra-Vision:
On the first stage, only shoot the first three star commander troops. This will give you infrared vision for the rest of the game as well as enable you to become a Kronn Warrior!
Tank Top Girls:
During 2-player mode, shoot the first 15 windows as soon as you enter the warehouse. You will get a room with tanktop girls.
In the hangar in wave 2, shoot out all 15 windows in the back of the hangar.
When you enter the building from the helicopter, shoot the Exit sign when you see a purple alien and then shoot the first three lights. This gives you the opportunity to shoot baby aliens before they form.
During wave 2, shoot all the exploding barrels and boxes just before you hop on the forklift.
There are 10 items that need to be hit; when successful, you're transported to "Egg Cellent."
Shake Your Booda:
In wave 2, shoot all 21 of the boxes at the back of the "hut." You need to shoot windows on
two different floors, because some can only be hit from the bottom. Clim up a ladder to the
top of the building and shoot some more. This should take you to "Shake Your Booda."
In wave 3 shoot out all four of the airplane canopies on the flight strip. This takes you to
Shake Your Booda 2:
At the very end of wave 3, you will hop on a helicopter. As you are flying you will see
11 boxes. Shoot out all the boxes to gain acces to "Shake Your Booda."
Egg Cellent 2:
After you enter the Administration Building at the beggining of wave 4, shoot out the first
red Exit sign and the three ceiling lights. This passage leads to "Egg Cellent."
Head Quarters 2:
In the middle of wave 4, shoot the 2 pictures on the desk. Then you will approach two doors,
each with a nameplate. Shoot the nameplates to go to "Head Quarters."
In wave 4, shoot all 11 pictures in the Administration Building. This leads you to
Egg Cellent 3:
In the war room in wave 5, shoot out all 13 computer ternimals to be sent straigth to
Chow Palace 3:
In wave 6 , shoot all 15 of the neutral barrels positioned at the lockdown at the bunker.
When successful, you're sent to the "Chow Palace."
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Thanks to Revolution readers Acid Burn, Ozzy, Srkmetta and Drucky, Faustino, Pedro Bresino!