Fallout: Brotherhood of Steel Cheats (PlayStation 2)

Finish the 1st chapter to unlock Patty.  
Patty is sort of like Nadia

Finish the game to unlock Vault Dweller.  
Vault is sort of like Cyrus


  
 

Finish the 2nd chapter to unlock Rhombus.  
Rhombus is sort of like Cyrus

Slugger: In Los, locate the docks and the alley behind the last of the sludge
pools. On the other side of the fences is a group of ghouls--nail 'em with grenades, and
as you exit the alley you'll encounter a larger ghoul. Take him down and you'll be
rewarded with the Slugger bat.

Meat Cannon: Again in Los, pay a visit to the Bridge chapter. Near the console
where you save your game, you'll need to hop over the dark abyss to reach an island on the
other side. In the lockers of the truck that's on the island you'll find the Meat Cannon.

To unlock a level's cut-scenes, simply complete the chapter. Once you fully complete the
game, you can access pin-up photos, and tons of concept art in the Bonus option of the 
main screen.