Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
- That's How it Was (10 points): Complete the Story on any difficulty.
- Unvarnished Truth (25 points): Collect all Nuggets of Truth.
- The Tally (20 points): Complete all Arcade missions.
- Magnificent Three (10 points): Score the maximum of 3 stars in any Arcade mission.
- Legend Among Legends (25 points): Get all Arcade Mode stars.
- For a Few Skills More (25 points): Unlock all skills in Story Mode.
- Perseverance (15 points): Unlock both exclusive weapons in a single category of skills in Story Mode.
- Honor Intact (20 points): Complete the duel challenge, winning all duels honorably.
- Last Man Standing (25 points): Complete the Story on True West difficulty.
- Trick Shot (15 points): Kill a bird during a winning duel.
- Quality Time (20 points): Fight in Concentration for 15 minutes.
- Ungrateful (15 points): Shoot a flying stick of dynamite and the one who threw it on a single Concentration.
- Turkey Shoot (20 points): Reach combo level of 20.
- Grows In The Telling (20 points): Complete the Story on hard difficulty.
- Full Blast (10 points): Kill a shotgunner with a close-range shotgun blast.
- True Story (10 points): Find all Nuggets of Truth in a single mission.
- Swift Justice (10 points): Win a duel honorably in under 0.6s.
- Death From Above (10 points): Kill 5 enemies when falling down through the air.
- Keep At It (5 points): Unlock a skill.
Additionally, there are seven secret achievements:
- This Time for Real (10 points): Give it to them straight about your meeting with Pat Garrett.
- There's More to It (10 points): Find and kill Johnny Ringo.
- Staying Afloat (10 points): Discover a shipwreck in the Missouri swamps.
- Righteous (10 points): Find and kill Jim Reed.
- Into the Sunset (20 points): Forgive your lifetime nemesis.
- Violence Begets Violence (20 points): Kill your lifetime nemesis honorably in a duel.
- For Massive Damage (10 points): Shoot through a hole to kill an enemy that hides behind a shield.