Getting health
When low on energy, kill worker doctors and even Red Faction men to pick up more health and Environment Suits.

Blasted Canyon: Sniper hole
You will start in one of the 2 blue boxes on the sides. Use a rocket launcher to tunnel down. Take about 2 shots in the back, then down about 2 to 3 shots. After that, just shoot out the walls in front (that the windows on the blue gate objects are) until you see light. Peek out and you can see the level below your box. *** You may die a few times before accomplishing this. In multi-player mode, select the Blasted Canyon level. When the game starts, look out onto the field and turn right at the wall. Get a rocket launcher and begin blasting the wall. Soon it will be large enough for you too fit in. Get inside, look down, and shoot a rocket (killing yourself). When you go back in, you should be under the floor. Begin blasting out some of the rock under the floor (killing yourself in the process.) After awhile you will have a cave under the floor. If you wish to make a sniper point, blast (under the floor) towards the field. You will soon see light, in which case you should blast open more until you can see the field.
*** Always bring a rocket launcher down with you, in the event you get stuck there is no getting out.

Installation XJ5: Hidden pit
In the deathmatch Installation XJ5, you can get outside to the pit. Grab the rocket launcher and jump down, then turn left. Note the archway above. Blast a hole in the wall below the doorway and start building a tunnel straight to the open window. Just going to the archway above and blasting around the window does not work due to an invisible wall. Once you make the tunnel all the way through, you can look down into the pit below, If you drop down, you will always die. Turn to the left or right and blast a hole big enough to jump into (make the hole on the outside of the wall). Jump into the hole, then make another hole directly in front of you but down slightly. Now that you have made another hole, jump into it. Make sure the hole is not too far down, or you will die from the fall. Repeat this process until you have reached the bottom of the pit. *** It is next to impossible to get back up once you are down there.

Game Hint
Go on the lobby multiplayer level go to the top floor and start blowing a hole in the wall and then in the roof, jump in and jump on the roof when your up there there's a Fusion Rocket Launcher a raildriver and an amazing sniper spot !! so get up there an have some fun.

Avoid detection
In the single player game, there are 2 locations where you have to be stealthy. One is when you pretend you are a businessman and the other is when you have to pretend to be a scientist. To make it easier to avoid detection from guards or other pedestrians, always look down or away from people. No one will learn your identity until you look them in the face.

Easy kills
Throw a remote mine on an enemy. If it hits, they will scream and run around instead of shooting you. Let them run around and eventually they will try to find guards. When they do, detonate the bomb to get 2 or more frags for one.

Badlands: Bottom of level
In this level, there are natural bridges over a giant pit which if you fall, you will usually die. Use the following trick to get to the bottom without dying. This will be difficult if you have more than 2 bots. It is recommended that you try this alone first. Find the rocket launcher that is next to a bridge. Go on the bridge and face the flat wall that leads to the bottom. At a 45 degree angle, start blowing holes downwards until you have almost reached the bottom. You now have to jump and try to make it into the 1st hole you created. .You will lose some health here from the fall. Once you are there, go backwards out of the hole and slowly drop down to the next hole. Repeat this pattern until you get to the bottom. Save at least 1 rocket so you can kill yourself -- the bots will not be able to get to you. This is difficult to do when playing against bots because of them shooting at you. Set the timer to 30 minutes. Take a lot of weapons such as the Rail Driver and the Sniper Rifle with you. Start blowing up the natural bridges from the bottom. Do not do it completely, but just enough to watch all the bots plunge to their deaths.

Ulimited Energy
From the Title Screen press and hold x for 5 seconds then start the game

Unlock everything
From MAIN MENU, hold select and press left, right,up, down, circle, triangle, square, x. If you enter the code in correctly, the screen will turn blue.

nifty wepons
and once again go to the lobby level, on the bottom floor there are some big stone pilas, go in between thees and there are some red revolution posters up, use a fusion launcher and fire at the sign, this will smash a hole in the wall and there are some nifty wepons just in side, ie flamthrowers. arnt i just the best!!!!!!!!!

Cheats
in the multiplayer mode choose the towers level. to get out of the tower just jump over the ledge, and to get back into the tower just go to the wall underneath it and press R1 + R2 + O + X (press this 3 time to make a door apear)

Red Faction (PS2) : Game Shark Codes
Game Shark Codes

Master Code (Must Be On) EC8E9778 1456E60A

Infinite Health [Note 1] 1CBF6618 1456E7A5
1CBF661C 1456E7A5
1CBF6620 1456E7A5
1CBF6624 1456E7A5
1CBF6928 1456E7A5

Infinite Ammo [Note 2] 1C84CA68 15F6E79D
1C84CA6C 1456E7A5

Infinite Ammo & All Weapons (1/2) 1C84CA68 39A1B0E5
1C84CA6C E19FE7B5
1C84CA70 E1A6E7A5
1C84CA74 E45669BD
1C84CA78 0456E7A0
1C84CA7C 1456E7A5
1C84CA80 2054E7BF
1C84CA84 28947065
1C84CA88 909AE7A5
1C84CA8C E65601BD
1C84CA90 3858EBA5
1C84CA94 2054E7AF

Infinite Ammo & All Weapons (2/2) 1C84CA98 28940215
1C84CA9C 1496AF9E
1C84CAA0 1456E7A5
1C84CAA4 3A46E7A6
1C84CAA8 2E53E7B7
1C84CAAC 0876B011
1C84CAB0 1456E7A5
1C84CAB4 DD9FE7B5
1C84CAB8 DDA6E7A5
1C84CABC 39A1E765
1C84CAC0 15F6E79D
1C84CAC4 1456E7A5

Note 1: Falling from a great distance will still cause damage, but shots from enemies and explosions will not hurt you.

Note 2: Mines and grenades will still deplete, but ammunition for all other weapons will be unlimited. Do not use this code with the other weapon codes.