Completion bonuses:
     Successfully  complete  story  mode  to  unlock  Magruder's seven
barrel Nock gun.

     Successfully  complete  story  mode  and  all side missions (100%
completion)  to unlock Reed's armored horse and Magruder's Cannon Nock
gun.

.69 Ferguson Rifle:
     Defeat Hollister.

Apache Shirt:
     Successfully complete the Hunting missions.

Cavalry Sword:
     Defeat Reed.

Dual Peacemakers:
     Defeat Reed.

Silver Spurs:
     Successfully complete the Pony Express missions.

Unlimited ammunition:
     Take  a  barrel of TNT from the Badlands mine. Find the abandoned
house  in  the Badlands where the buffalo graze. Go to the back of the
house  on  the  outside. Face the chimney (looking west) and place the
TNT  barrel on the left side of the chimney. Blow up the TNT barrel to
open a hole in the ground with unlimited ammunition for all weapons.