Red Dead Redemption

In order to obtain a 100% completed game, the following tasks must be done.

Bounty Hunter (2%), which include eight in New Austin, eight in Mexico, and four in West Elizabeth (North).
Gang Hideouts (3.5%).
Jobs (2.5%), which include Nightwatch at MacFarlane's, Chuparosa, and Blackwater; and Horsebreaking at Ridgewood and Chuparosa. Note: You only need to do each location once.
Map locations (6%), which can be done by purchasing the maps from general stores or finding all the locations yourself.
Mini-games (3%), which include Poker, Blackjack, Five Finger Fillet, Horseshoes, Liars Dice, and Arm Wrestling. Note: You must make a profit on each game.
Outfits (4.5%), which include the Elegant Suit, Rancher, Poncho, Bollard Twins, Treasure Hunters, Banditos, Reyes' Rebels, U.S. Army, and U.S. Marshals.
Rank 10 challenges (4%), which include the ambient challenges Sharpshooter, Master Hunter, etc. Note: Reaching level 5 and 10 for each of them adds 1% to your total completion.
Rank 5 challenges (4%)
Rare weapons (2.5%), which include the , Mauser Pistol, Evans Repeater, LeMat Revolver, Semi-automatic Shotgun, and Carcano Rifle.
Safehouses (2%), which is done by purchasing all the buyable safehouses and renting both rentable ones for a total of thirteen.
Story missions (57%).
Stranger missions (9%), with the exception of "I Know You".

There's a cliff and a waterfall in the far northern regions of New Austin -- just above the MacFarlane Ranch. Enter this area and you'll see "Tall Trees" appear on your screen. If you can manage to get arrested here you'll get carted off to Blackwater. From here you can access the full northern map. You'll need to auto save (see 'Save Anywhere' cheat) and die to return to the southern areas. If you buy the property in Manzanita, it will prevent you from doing this. However, it is possible to hop the unfinished bridge in Thieves' Landing to get back.

Create an account on the and link it to your Xbox Live or PSN account to unlock he following cheats.

Also, the following cheats are unlocked by completing Social Club Challenges after you have created an account.

Take out a target's legs using a throwing weapon, such as the throwing knives, or tomahawk, or even a pistol. Then, move in close, aim at the target, and press R2  or RT  Xbox 360  as you normally would do for a kill. If done correctly, Marston should perform a special kill for the position of them being on their knees. Note: This works with pistols, throwing knife, tomahawk, shotgun, and rifle (not explosive). Note: This only works with people who have a gun, and that they will fire back if they are given the chance to.

Enter Dead Eye mode when you are low on ammunition. Your ammunition will be restored without the need to reload.

Get 100% game completion (all challenges, side-quests and items) to unlock the Bureau Uniform. When worn, local law enforcement and bounty hunters will ignore you.

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.

Give the nuns money whenever possible. Attaining maximum honor and fame may help. A nun will eventually approach you. She will tell you that she and the other sisters have been gathering items to help your righteous cause. She will give you a cross that makes enemies less likely to hit you with bullets. Note: You must remain honorable for this to remain in effect.

Once you become dishonorable enough, your horse and clothes will turn black. However, they will only stay black while you are dishonorable.