In order to obtain a 100% game completion, perform all of the following tasks:
Story missions (57%). Stranger missions (9%), with the exception of "I Know You". Outfits (4.5%), which include the Elegant Suit, Rancher, Poncho, Bollard Twins, Treasure Hunters, Banditos, Reyes' Rebels, U.S. Army, and U.S. Marshals. Gang Hideouts (3.5%). Bounty Hunter (2%), which include eight in New Austin, eight in Mexico, and four in West Elizabeth (North). Rank 5 challenges (4%) 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. Rare weapons (2.5%), which include the , Mauser Pistol, Evans Repeater, LeMat Revolver, Semi-automatic Shotgun, and Carcano Rifle. 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. 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. Map locations (6%), which can be done by purchasing the maps from general stores or finding all the locations yourself. Safehouses (2%), which is done by purchasing all the buyable safehouses and renting both rentable ones for a total of thirteen.