- Xbox 360
Infinite ammo
Take a barrel of TNT from the Badlands mine. Locate the abandoned house in the Badlands where the buffalo graze. Go to the back of the house on the outside. Face the chimney looking west and place the TNT barrel on the left side of the chimney. Blow up the TNT barrel to open a hole in the ground with unlimited ammunition for all weapons.
Silver spurs
Successfully complete the Pony Express missions to unlock the Silver spurs.
Faster riding:
Hold Dash while repeatedly jumping your horse to travel about double the speed.
A Hole In The Wall
If you take a barrel of TNT from the Badlands mine and put it on the north end of the old abandoned house's chimney. The explosion will open up a hole in the ground with unlimited ammunition.
To get there, get out of Dodge City. Make your way to the Badlands use your map for directions and head into the field that has several horses and buffalo. The house and the mine with the TNT will be right next to you.
Unlock Magruder's seven barrel Nock gun:
Successfully complete story mode to unlock Magruder's seven barrel Nock gun.
Unlock .69 Ferguson Rifle:
Defeat Hollister.
Unlock Apache Shirt:
Successfully complete the Hunting missions..
Unlock Dual Peacemakers:
Defeat Reed.
Unlock Silver Spurs:
Successfully complete the Pony Express missions.
Completion bonus
Successfully complete Story mode to unlock Magruder's seven barrel Nock gun. Successfully complete Story mode and all side missions 100 completion to unlock Reed's armored horse and Magruder's Cannon Nock gun.
Defeating Magruder
It is not possible to kill Magruder by shooting him, as he is wearing armored plating. Instead, use the bow with exploding arrows. Get Magruder to chase you. As you are backing away from him, shoot an arrow at a geyser as he walks over it. The flammable gas coming from the geyser will explode and damage Magruder until he is almost dead. Then, when he is on the higher level, shoot him in the face with the rifle until he yells, then get into Quickdraw mode. Get ready to shoot the big package of dynamite when he throws it. After shooting a few sticks of dynamite, the roof will collapse on him.
Defeating Reed
Never let Reed out of your sight. If he is by himself and you cannot see him, he will gain health.
Desecrate Hoodoo's corpse
After defeating Hoodoo, there will be a intermission sequence showing him dead standing up in a coffin. After the sequence, he will still be in west empire standing in the grave. You can shoot him with your double-barrel shotgun in some areas. You can shoot off his head, arm, and both of his legs, leaving his corpse floating in an up-right coffin.
Dual peacemakers
Defeat Hoodoo Brown to unlock the Dual peacemakers.
Easy money
You can earn more money on the bounty hunter side missions by capturing bounties alive. When you find a wanted poster that offers more money if you capture them alive and are having trouble doing so, use the following trick. Kill all gang members or bodyguards if any. If the bounty is on a horse, kill the horse. Get close and melee attack. This will stun the fugitive and present an opportunity to grab them. Then, subdue the fugitive. This will award you more money for each bounty. If you accidentally release him, you can try to melee him and grab him again. However, if you do this too many times or if he has been shot, you may kill him and get less money.
Easy poker game wins
When playing Texas Hold 'em inside the Alhambra, you can easily win with or without a good hand. Raise the bid to the maximum. This should make at least one to three players fold. You can then cheat to make your hand better, and if the cheat card is a worse card, just go back to your original hand. Afterwards, keep checking your hands until one of you wins. It should be you most of the time. Do not worry if you lose, as the tournaments are free.
End of poker cheating
When playing Texas Hold 'em after the tournaments in the Alhambra, you will no longer have the option of cheating.