Unlockables
Unlockable How to Unlock
Magruder's Seven Barrel Nock gun Successfully complete Story Mode
.69 Ferguson Rifle Defeat Hollister
Apache Shirt Successfully complete the Hunting Missions
Dual Peacemakers Defeat Reed
Silver Spurs Successfully complete the Pony Express Missions
Cavalry Sword Defeat Reed.
Reed's Armored Horse Complete the game and get 100%

Story Mode Unlockables
Unlockable How to Unlock
Magruder's seven barrel Nock gun Successfully complete the Story Mode.
Reed's horse and Magruder's Cannon Nock gun Get 100% completion in the Story Mode.

Xbox 360 Gun Achievements
This is a list of all the achievements in Gun, and how to get them.
Unlockable How to Unlock
The Hunt Complete Progress through The Hunt level on any difficulty.
Honest Tom Complete Progress through the Honest Tom level on any difficulty.
Quick Killer Complete Progress through the Quick Killer level on any difficulty.
Law and Order Complete Progress through the Law and Order level on any difficulty.
Ambush the Train Complete Progress through the Ambush the Train level on any difficulty.
Take Down Hoodoo Complete Progress through the Take Down Hoodoo level on any difficulty.
Hollister's Fort Complete Progress through the Hollister's Fort level on any difficulty.
Battle at the Steamboat Complete Progress through the Attack the Fort level on any difficulty.
Escape the Ambush Complete Progress through the Escape the Ambush level on any difficulty.
Professional Prospector Mine every gold ingot in the West.
Keeper of the Peace Find and complete the Keep the Peace side mission.
Every upgrade collected Collect every upgrade in the game.
Professional Postman Find and complete all of the Pony Express side missions.
Every weapon collected Collect every weapon in the game.
Normal Difficulty Complete Complete the game on the Normal difficulty.
Insane Difficulty Complete Complete the game on the Insane difficulty.
Card Shark - 40 points Get 100% completion in Poker Tournaments