All Weapons
To get all weapons you have to go
to the main screen and press L1, R2, L2, R1, X.
Invincibility
Pause game and press L2,L2,R1,R2,R1,L2
Infinite ammo
Take the chain gun, which is weapon number
5 in the list, and then press the fire button. Keep holding it down, and then
change your weapon to anything else. Now you should have unlimited ammo on your chain gun
AND machine gun if you did it correctly. This may take a few tries.
Easy difficulty bonus
Successfully complete and save the game on the easy
difficulty setting to unlock a "One Hit Kill" and "Weapons
Stay" options for multi-player mode.
Medium difficulty bonus
Complete and save the game on medium difficulty setting
to unlock the "Game Speed", "Blast Force", "One Hit
Kill" and "Weapons Stay" options for multi-player mode
Hard difficulty bonus
Complete and save the game on hard difficulty setting
to unlock the "Unlimited Ammo", "All weapons", "Game
Speed", "Blast Force", "One Hit Kill" and "Weapons
Stay" options for multi-player
Defeating Makron
To defeat Makron easily, just strafe (ie side step)
around pillars and shoot rockets at him. Be quick, as he can take you down with
one shot from the BFG 10K. When the robot machine gets destroyed, stand in a
corner of a pillar and angle your view so you can hit him. This will cause him
to become confused and walk back and forth. Use grenades or rockets to destroy
him.
Bronze Cheats
To achieve the Bronze Cheats, you must end the game in the easy difficulty This
will open two options for multiplayer mode: Weapons Stay and One hit kill
NOTE: Remember to save the cheats on your memory card
Gold Cheat
To get gold you must beat the game on hard. Winning gold will give you infinite
ammo, all weapons and all the rest of the multiplayer codes you receive when you
win silver and bronze
Silver Cheat
To enable Silver Cheat, finish the game in MEDIUM difficulty. This will open 2
more bars in multiplayer mode : Game Speed and Blast Force. Plus it will unlock
the multiplayer cheats you get for winning bronze.
Hidden Areas in Multiplayer
Yes, even multiplayer has secret areas in it.
In the Hydophobia level, go into that hallway that's all red. Stop in the center
and you'll notice a darkened area on the wall. Shoot it and it will reveal a
BFG10K. There's another secret. In the pool of water by the super-shotgun, jump
in and shoot the center of the wall by the shotgun to reveal a quad damage.
In Toxic Vats level, go into the narrow hallway with a ladder on each side. Take
the ladder that brings you to the platform where you can get on the moving crane
thingy. Take the hallway to the part where you're standing on the glass platform
with the hyperblaster on it. look down through the glass and you'll be able to
see a rail gun submerged in a small section of the toxic waste. Jump in and swim
down and get the rail gun.
Kill Final Boss easily
First when you enter the boss room strafe one step to
the right so you see the tank commando and shoot him down with your rocket
launcher when he's dead run forward to the flying enemy and run from right to
left and shoot at him with your hyper blaster and when you don't have any more
ammo take the mini gun and do the same thing again. Then you shoot the other
tank commander with your rocket launcher and when do the same thing to the
flying enemy
