Complete each achievement to get the allotted gamerscore. The numbers between the () is the points given for each achievement.
| Unlockable | How to unlock |
| Accurate guy (25) | In Episode VIII kill McLyde brothers with 2 bullets only. |
| Archeologist (25) | Finish Episode XI in less than 10 minutes. |
| Archer (20) | In Episode IV kill 10 enemies using bow. |
| Blind Killer (10) | Playing as Sniper kill 5 enemies with the sniper rifle without using the scope. |
| BonusLevelsFinished (15) | All bonus levels finished. |
| Bounty Hunter (40) | All Wanted posters found. |
| Bow Expert (30) | In Episode XV kill 10 enemies by shooting them in the head with the bow. |
| Boxer (20) | In Episode II use correctly 5 combos fighting with looters. |
| Demolition (25) | Playing as Gunslinger keep at 100% killing efficiency for X dynamite stick throws. |
| Driver (30) | In Episode V kill 5 enemies when driving the coal cart. |
| Duel Challenge finished (20) | Duel Challenge finished. |
| Eagles Eye (30) | In Episode XIV kill 10 enemies by shooting them in the head with the sniper rifle. |
| Earthquake (30) | Playing as Miner kill 4 enemies with a single dynamite stick. |
| Fire Raiser (25) | In Episode XIII kill 3 enemies using fire. |
| Fireworker (25) | 10 dynamites shot mid-air. |
| Gun Collector (45) | All bonus weapons found. |
| Gunfighter (15) | In Episode III kill 10 enemies using Concentration Mode. |
| Hatman (25) | In Episode VI shoot 6 hats off from enemies' heads. |
| Headhunter (20) | Playing as Sniper score 5 headshots in a row. |
| Horseman (20) | In Episode X kill 7 enemies while in the saddle. |
| Killing machine (50) | 20 enemies killed in Multiplayer without dying. |
| Legend of the Wild West (50) | 300 enemies killed in Multiplayer. |
| Long distance (20) | A distance of 10 miles covered. |
| Lucy's lullaby (20) | Playing as Miner kill 3 enemies with a single shot from the sawn-off shotgun. |
| Quicker than hell (10) | Playing as Gunslinger shoot 4 enemies using the quickshooters in less than 10 seconds. |
| Religious Man (20) | 44 enemies confused by reading the bible. |
| Rifle Expert (20) | Playing as Rifleman keep 100% rifle efficiency for 10 shots. |
| Slayer (20) | In Episode VII defeat 6 enemies using the whip. |
| Spider hunter (20) | In Episode XII kill 10 spiders using the whip. |
| Story Mode finished (60) | Story Mode finished. |
| Surefire hand (20) | Playing as Rifleman shoot 5 enemies using the rifle without reloading. |
| Thief (10) | In Episode I steal Jones' gun without alarming him. |
| Untouchable (40) | Finish Episode IX without taking a scratch. |
| Very Hard Mode finished (100) | Story Mode finished on Very Hard difficulty level. |
| Westman (20) | Played for more than 24 hours. |
| Young god (25) | 6 bullets dodged in duels. |