Completed the prologue.

Complete "An Appointed Time".

Complete Tumbleweed and Tesoro Azul Hideouts in Single Player.

Purchase a rare weapon from a gunsmith.

Complete 20 story missions without switching to a new horse at a hitching post.

Complete a task for a Stranger.

Complete "Exodus in America".

Campaign: destroy 1000 objects

Campaign: 50 kills with sniper rifles

Campaign: finish Heavy Metal

Campaign: finish Snowblind

Campaign: find 15 collectable weapons

Campaign: destroy 100 objects