To get gold you must beat the game on hard. Winning gold will give
you infinte ammo, all weapons and all the rest of the multiplayer
codes you recieve when you win silver and bronze.
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
Beat the game on the easy difficulty. This will give you two options
for multiplayer mode: Weapons Stay and One hit kill.
Pause game and press L2, L2, R1, R2, R1, L2.
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 hyperblaster and when you
don't have any more ammo take the minigun 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
Hidden multiplayer areas:
In the Hydophobia level, go into that hallway thats 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 railgun
submerged in a small section of the toxic waste. Jump in and swim
down and get the railgun.
Take the chaingun, 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
chaingun AND machine gun if you did it correctly. This may take a