Bulletstorm

Bulletstorm cheat codes: 
Gun and Price Hacks:
Open the "defaultweapon.ini" & "defaultupgrades.ini" files in a text editor.
They can be found in "../bulletstorm/stormgame/config" in either
your EA folder or STEAM if you have it there.

Now look at:
ammocost[0]=, ammocost[1]=, unlockchargedammocost=, and unlockweaponcost=.

These are all the prices in you'll pay in the shop for a weapon.
Simply change all numbers 1 to reduce prices to 1 point a piece.

Changing all the ammopershot[0]= and ammopershot[1]=
stats will make your weapons have infinite ammo.

Changing rateoffire[0]= and rateoffire[1]=
stats will make your weapons fire faster.

For example, a good shotgun setting is rateoffire[0]=120 rateoffire[1]=120.
Note: [0] and [1] refers to the (normal) and (alternate) fire modes in game.