X-Files: Resist or Serve Cheats

When you get on the cable car in act 1 level 1,you have to deactivate it

Shooting him is a waste of time and bullets. When Hector is underneath
the car lower the jack to hurt him.

When making the optical disc in Episode 2, if you type in the Chris Barnes code first, you will get a first aid kit. You can type it in as many times as desired.

First go to the options menu, and choose game settings en than select ' cheats ' there you can enter the following cheats:
Unlimited ammo:
L1, L2, X, R2, R1
Invincibility:
up, square, circle, X, down
grenades as bullets:
X, circle, square, L2, R2
Kill enemy's whit one shot:
circle, L2, down, R1, X
Unlock al bonus:
right, R1, L1, down, circle

Type in 'cheats' section--
Unlock All Acts: R2, RIGHT, L2, UP, SQUARE

Unlock All Bonus Features: LEFT, R1, L1, DOWN, CIRCLE

In the beginning of act two for red falls you will go to a building where you'll take a
train. Before you can leave you'll have to activate the power. Kill the zombie. All
you'll have to do is flip the switch in the back, then flip the switch on the control
panal, then just flip the switch in the back one more time to give power to the
train. But before you get into the train check the body of the zombie in the control
room. You will find fingerprint liquid. Use this liquid on the bomb and it will show
you the three digit number. This number will defuse the bomb.

At the optical disk, instead of entering Mulder's code enter Chris Barnes' code to receive a free health pack. You can repeatedly enter Barnes' code for more health packs, but only until you enter Mulder's code.