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 option. Note: Enabling cheat codes will prevent the game from being saved and will prevent achievements or trophies from being unlocked.

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