The following were pre-order bonuses prior to the release of Red Dead Redemption. They are sorted by bonus with the available retailers listed underneath. These pre-order bonuses are for single player use in the main game, not multiplayer.
These RDR pre-order bonuses were later released on April 12th, 2011
as Downloadable Content
at $0.99 or 80 MS Points each for either the PlayStation 3 or Xbox 360.
Deadly Assassin Outfit - Gamestop (US & Canada), Game (UK)
Dead Eye regenerates twice as fast while wearing this suit. See Red Dead Redemption Outfits Guide here
on how to obtain it.
"The Deadly Assassin outfit causes your Dead Eye meter to regenerate at twice
the speed. With more Dead Eye, you have more time to place each shot with total
accuracy, making you the deadliest gunslinger in any fight."
The Golden Guns - Amazon (US, Canada & UK)
Golden versions of the Repeater Carbine and the Cattleman Revolver which give more fame per kill.
"The player who wields the exclusive Golden Guns receives more Fame for each
kill. The more Fame you get, the more in-game side missions become available.
So there will be more opportunities to duel, more kidnapped townsfolk to rescue
and you can bribe lawmen for less."
The War Horse - Best Buy (US & Canada), HMV (UK)
Best horse in the game with increased speed and damage resistance.
"There are countless horses to be found in the massive world of Red Dead
Redemption, but none is stronger, faster or tougher than the exclusive War Horse."