Rockstar has detailed two of the upcoming DLC packs for Red Dead Redemption. First up, the Liars & Cheats pack will be coming September 21st. Due to Microsoft and Sony limitations on how many free DLCs Rockstar can release, the free roam pack had to be combined into the Liars & Cheats pack making the pack expand competitive multiplayer as well as free roam. Some of the new features include:

Multiplayer Poker and Liar's Dice Games
One of the most fan-requested features comes to multiplayer.

Multiplayer Horse Races
Ride out against your friends and foes online - with mounted combat guns blazing.

The Explosive Rifle
A devastatingly destructive new weapon with its own new single-player and multiplayer challenges.

7 New Gang Hideouts
Posse up and take on the new Hideouts together to level up quickly.

4 New Hunting Grounds
New Hunting Grounds are now visible on the map for all to see, with some of the most action-packed wildlife hunting yet.

Stronghold Competitive Multiplayer Mode
Teams take turns in attack and defense in multi-tiered Competitive games. Posse Scoring and Leaderboards
Compare stats with other posses and compete to see who are the kings of the Free Roam frontier.

Plus, 15 additional multiplayer characters from the Red Dead Redemption storyline are being made available as multiplayer characters, and more all-new Achievements and Trophies. 

The Liars & Cheats pack will be out September 21st for $9.99 or 500 MS points.

In addition to detailing the Liars & Cheats pack, Rockstar has also released the first details on the Undead Nightmare pack which is the first single-player oriented DLC pack.

Unleashed upon the world of Red Dead Redemption, the Undead Nightmare Pack will feature an entirely new single-player campaign that follows John Marston as he tries to find a cure for the highly infectious zombie plague that has spread across the frontier. 

In addition to the lengthy single-player adventure, The Undead Nightmare Pack features brand new gameplay mechanics, weapons, zombie animals, mythical creatures and even a brand new secret location.

The Undead Nightmare pack will also be $9.99 or 500 MS points. A release date has yet to be determined.

--

Looking for some free stuff? Rockstar will soon be releasing Hunting and Trading Outfits Pack. The pack will make both the Savvy Merchant and Expert Hunter Outfits from the pre-order bonuses free for everyone and will also add compatibility for DLC you haven't bought and downloaded yet meaning if your friend is using a multiplayer character from the DLCs, you will be able to see the same character he does. No specifc release date was given but it should be out within the next few weeks!