Instructions
Select "Multiplayer" from the "Red Dead Redemption" main menu.
Gain experience by killing other players, completing challenges, winning team games and completing objectives such as clearing out all enemies from a gang hideout.
Increase in rank by earning enough experience. Each rank requires more experience than the previous one, and the amount of experience necessary for each rank is viewable on the pause menu.
Unlock new mounts when a specific rank is reached. For example, unlock the Lustiano Nag mount at "Rank 4," and the American Standardbred at "Rank 40."
Select "Outfitter" from the pause menu to change your mount at any time during a multiplayer game.