Secrets -  100% Accuracy  -  When shooting hold the up button on the D-Pad, the bullets will never miss and you will get one shot kills.

Secret Weapons  -  In multiplayer mode choose a level with posters then get a rocket launcher and shoot at the poster (this may take 2 shots) and there are secret weapons in there.

BMF location - In deathmatch:lobby...Go upstairs and grab the rocket launcher, now go to the wall facing the lobby (you're still upstairs) start blowing up the wall and make a hole to the roof! where there is one of those BMF's at the top!

Secret Rooms - In the lobby, as you go up any ramp, blow a hole in the wall with a rocket launcher wherever there is writing on the wall. There will be a secret room in each writing spot. there are two flamethrowers, a rail driver, and a fusion rocket launcher.

Get Weapons - During gameplay press select then press Down, Down, Left, Right, Left, Right, Up, Up, Square, Square.

Easy Kills - Equip the grenade launcher and when an enemy charges at you, either fire a rocket at the ceiling above your foe or just in front of his feet. This should be a 1 hit kill, or aim the shotgun at your opponent's leg this is a 2 or 3 shot kill.

Full Health - During gameplay, press Select, Up, Left, Down, Right, Up, Up, Down, Down, Circle, Circle.

All Weapons - During gameplay, press Select, Down, Down, Left, Right, Left, Right, Up, Up, Square, Square.

Max Out Health: - During gameplay press Select then press Up, left, Down, Right, Up, Up, Down, Down, Circle, Circle.

100% accuracy - To get 100% accuracy with any gun, including the heavy machine gun, just hold the D-pad up to aim. When you shoot, the bullets will always hit their mark, even if you hold down the shoot button with an automatic gun.

Defeating Capek: - When you reach Capek's Inner Sanctum, there will be a few guards with heavy armor. Try and take them all out, except for one because as soon as you do, Capek appears. Run to the ramp on the right-hand side of the room and take a right at the top of the ramp to follow another ramp up towards a door. Arm yourself with the Assault rifle and take out the last guard. As soon as you do, Capek appears and Eos blasts through the door where you are standing. Run through the hole she made and you will find health and weapons. Save your game at this point. Then, use the assault rifle to defeat Capek. However, stay away from Eos because if she dies the fight ends.

After defeating two of the three guards, run up the ramp to your left and take the gun and ammunition. Then, kill the guard on the opposite side. Capek will immediately descend from above. At this point keep moving -- do not try to fight him, but stay on the ramp. Eos will break through the door where the third guard was located and begin shooting Capek. Quickly run through this door and pick up the sniper rifle and ammunition. Then, back up so that you are out of Capek's sight. When you go back to the doorway, you will see that Capek has ascended back up to where he dropped down from and Eos is running around shooting at him, but he is not firing back. Stay in the doorway, take out the sniper rifle and shoot his protective purple bubble five times -- do not worry, he will not shoot back. After five shots, his bubble will burst, he will drop down to the platform below, and begin shooting at you again. Leave the doorway and begin shooting him with one of your automatic weapons. That combined with Eos' shooting will defeat him easily. Note: As you are running around, stay away from Eos -- if Capek's projectiles miss you, they will hit her and your game will be over. Capek never tries to hit Eos; he just wants you.

Finding secret areas:- Every time you see markings on the wall (for example, posters and paint) in multi-player mode, use something explosive on it. It will lead to a secret area.

Guard suicide:- When a new game is started, you would usually follow a fellow miner, hear them talk, and then fight each other. Instead of listening to them talk, go right past them. One of the soldiers will start firing at you. Immediately after he starts firing, place your fellow miner in between yourself and the firing guard. Your fellow miner will die, leaving the guard he was talking to start talking to himself, fighting himself, and then killing himself.

Free Fusion Rocket Launcher ammunition in multi-player mode:- Once you have the Fusion Rocket Launcher in multi-player mode, kill yourself with it, If you can get back to your corpse, you can pick it back up. When you do, it will have three shots on reserve and a fourth ready to fire.

Water in the sub:- In training mode, after you ride in the submarine, point the nose of the sub out of the water. Make the sub completely vertical, then press X to get out. You will get out of the sub in the cockpit of the sub. You can look outside, and there is a bit of water in the sub where the chair is located

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 two or more frags for one.

Avoid detection:- In the single player game, there are two 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.

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

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 two 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 first 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.

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. Note: It is next to impossible to get back up once you are down there.

Lobby: Secret roof area:- Go to the second level of the Lobby multi-player level and grab the rocket launcher. Walk over to the edge of the balcony and start shooting up towards the wall facing the lobby itself. After enough shots you will dig a tunnel to the roof. Walk through and jump right up. You can shoot out the glass and snipe people down on the second level. There also is a Fusion Rocket Launcher that you can grab.

Lobby: Hidden items:- Go to the four corners on the first level of the lobby after you have obtained the rocket launcher in the muti-player level. Use the rocket launcher on the four corners to find health, enviorsuits, a fusionrocket, a flame thrower, and a rail driver.

Mercs Base: Entering:- After the crash site, you will follow a system of tunnels and ridges filled with enemies (most with heavy machine guns, some with fusion rockets and rail drivers). When you meet the Red Faction miner in the caves, he will say that he will watch your back. At this time you will follow a tall tunnel to a bridge -- you do not want to be on the bridge. Between the miner and the bridge is a turn off that leads to a catwalk going over the bridge. Kill the two gaurds and follow the catwalk until it stops at a hole in the wall. Jump from the catwalk into the hole and follow it until you get the grenades. Use them to kill the turrets and the fusion rocket carrying guard on the other side of the large rock by the grenades. This saves time and health you would have spent trying to fight the guard and the turrets.

The Shooting Gallery: Avoiding damage:- When nearing the end of the game in single player mode, you will have to catch the tram to proceed to the next area. The tram is located immediately after "The Shooting Gallery." In order to avoid fighting most of the guards, equip the Heavy Machine Gun. Next, proceed down the track towards the small door to the left. Inside, kill the guard. Once the other guards stop rushing in and shooting at you, collect the health vial (just behind the desk), dash out of the room, head towards the front right side corner of the train, and duck down immediately. This will prevent gun fire from hitting your character. Stay ducked down until the loading screen appears.

Waste Disposal: Easy kills:- In multi-player mode on the Waste Disposal level, swim down under the platform to find a fusion rocket. You can also use mines to blow holes under the doors into the hallway. When bots come by, they will fall into the water for an easy kill.

Gameshark 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.