Secret Stage:
There is a secret stage called the Chow Palace. So far, two ways to 
get to it have Been found. For the first, near the beginning of the 
game is a Part where you ride through the complex in a jeep. After 
that, you enter the office. Near the end of the Office where you go 
through the fire, there is a part With paintings on the walls and 
two office doors. Shoot all of the paintings and both office doors. 

Secret Stage 2:
On the last level where the aliens Are throwing barrels at you, 
destroy all of the aliens, the barrels, And ammo boxes. In the 
large room with all of the trucks and Helicopters in it, if you 
shoot all of the lights you Should find a sercet room called 
Headquarters. When riding the jeep, shoot all of the yellow 
barrels And you should get a secret room called Eggcellent.

Kronn Hunter / Nightvision:
After starting a new game, shoot nothing but the first Three 
S.T.A.R.R. members that show up. 

Start with Shotgun
Pause the game, and press TRI, SQU, TRI, LEFT, R1. 
SUBMITTED BY: Matt Gustavson 

TO PLAY AS ALIEN:

You must shoot one of the human marines three Times without firing 
one single shot at anyone else. Then you will either Turn into the 
alien automatically or if that doesn' t happen then just let 
Yourself die and you will restart as a alien. When your' re the 
alien you will Have a info red vision which make the eyes stick 
out a lot more! 

Submitted By: SPHAMMER

To get Invuneralbility:

Dont not shoot ANYTHING until you last life as in the last health
thing....when you shoot them they will shoot you but you wont get hit!!!

Submitted By: Vimen


BECOME KRONE HUNTER:
if you kill the first three staar members
youl become a  krone hunter
(Dont worry,no one will be ablke to shoot you after killing the first staar member)

Submitted and FULLY tested By: norsken


SECRET STAGE:

shoot all the windows inside the first building

Submitted and FULLY tested By: Eric Andrew