When you purchase a newspaper always check the bottom right for the codes. There may also be others throughout the paper. Enter the following codes to activate the corresponding cheat function. Note: Enabling cheat codes will prevent the game from being saved and will not allow achievements or trophies from becoming unlocked.

Effect	Code
+$500	THE ROOT OF ALL EVIL, WE THANK YOU!
Coach	NOW WHO PUT THAT THERE?
Decrease bounty	THEY SELL SOULS CHEAP HERE
Diplomatic Immunity (no bounty/wanted level)	I WISH I WORKED FOR UNCLE SAM
Famous	I AM ONE OF THEM FAMOUS FELLAS
Good Guy (get good reputation)	IT AINT PRIDE. IT'S HONOR
Gun Set 1	IT'S MY CONSTITUTIONAL RIGHT
Gun Set 2 (Buffalo rifle, sawed-off shotgun, semi-auto pistol, Schofield revolver, Winchester repeater, fire bottle x3)	I'M AN AMERICAN. I NEED GUNS
Hic (become drunk)	I'M DRUNK AS A SKUNK AND TWICE AS SMELLY
Horse (spawn horse)	BEASTS AND MAN TOGETHER
Infinite Dead Eye	I DON'T UNDERSTAND IMNFINITY
Infinite Ammo	ABUNDANCE IS EVERYWHERE
Infinite Horse stamina	MAKE HAY WHILE THE SUN SHINES
Invincibility	HE GIVES STRENGTH TO THE WEAK
Jack Attack (turn John into Jack, his son)	OH MY SON, MY BLESSED SON
Lewis & Clark (all areas unlocked)	YOU GOT YOURSELF A FINE PAIR OF EYES
Man In Uniform (Bureau Uniform, U.S. Army Uniform, and U.S. Marshal Uniform)	I LOVE A MAN IN UNIFORM
Old School (sepia graphics)	THE OLD WAYS IS THE BEST WAYS
Sharp Dressed Man (Gentleman's suit)	DON'T YOU LOOK FINE AND DANDY
Spawn horse	BEASTS AND MAN TOGETHER
Treasure Hunter outfit	YOU THINK YOU TOUGH, MISTER?
Who? (become a nobody)	HUMILITY BEFORE THE LORD